Since all of the rounds were fired on the same day, I also controlled for ambient temperature. When looking at .277 Fury's ballistics, . A. You may not reproduce original text or photos without advanced permission in writing. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) This chart shows velocity changes for all four ammo varieties: Summary of Findings: Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. Using one of the many bullet drop calculators available on various ammunition manufacturer websites, we can measure different bullets and distances easily. Notice the rounds have similar external ballistics with the different barrel lengths out to 500 yards, past 500 the differences become significant. Here are some pics: I get this every so often. a debt of gratitude. Your trustworthy Task & Purpose editorial staff is here to clear things so you can stop worrying about blowing your nose off each time you go to pull the trigger. In the good old days of Precision Shooting magazine (how we miss you! That said, we wouldnt make a habit of it. Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. Of course, this all takes place within mere fractions of a second. The 6.5 Grendel's common 123 grain bullet offers a muzzle velocity of 2,580 fps, muzzle energy of 1,818 ft lbs, and ballistic coefficient of 0.506. Super Short Precision Rifles: Is there such thing as a 16.5 .308 Tactical Bolt Action Rifle? The barrel was cut off using a cold saw. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. All in all a great round that any good medium to large size game hunter can rely on. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. While the .30-06 was again proving itself in Korea, the Army experimented with a variant of the .300 Savage that is designated the T65. 20" seems to be ideal for the 7/08 and the 308. from 18" to 20" on a 7/08 I gained almost 200 ft/sec. IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. Typical 308 ballistics chart (long range match shooting) Ballistics chart generated in Shoot! At 300 yards it has dropped around 13 inches, and at 500 yards it's just under 60 inches (5 feet). Do you trust the results from the MagnetoSpeed? Velocity Boundaries (Feet per Second) of: 1740 1460 1460 1460. So in quick summary the .308 Winchester also known by it's military name the 7.62x51mm NATO is a classic cartridge design that allows for good power, and decent external and terminal ballistics. Enter your email address to subscribe and receive notifications of new posts by email. I offered to let him shoot it. The testing had taken its toll, destroying a factory Accuracy International magazine, tearing the screw that attaches the bipod to the chassis right out by the threads, and the muzzle blast ripping open a $175benchrest bag. So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our My data showed an average change of 27 ft/sec per inch of barrel. At each cut length, velocity was measured with a Magnetospeed chronograph. class bullets. Turning a sporter contour rifle barrel from a blank, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance 6.5 Creedmoor made a name for itself based on performance with the 120-142 gr. We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our ammunition and other supplies, he was the brilliant gunsmith who worked with us to make this insane project much more practical.Without his help all of this would have been much more difficult and perhaps impossible. Shilen .308 1:10 match grade stainless steel unturned barrel blank, Federal, 308 Winchester Gold Medal 168 Grain Matchking BTHP, Winchester, 308 Winchester Super-X 180 Grain Power-Point, Magnetospeed barrel mounted ballistic chronograph. Would be interesting to find out. How you use the data is entirely Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The cuts were made in one-inch intervals with a rotary saw. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. pistols are measured, but revolvers are measured as the length of the barrel in front of Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. I post it here, for free, so other shooters can learn from it. By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. the cylinder gap. (More powder and more pressure). We (well, Jim K, Since the barrel was an unturned blank and did not have a taper, cuts were square. Remington Model Seven Actions are available! Never miss a post! He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. No guessing, no models, no arbitrary numbers. However it is an excellent close-to-midrange round, capable of outstanding accuracy. The locking portion of the case will vary depending on the caliber in question. It's fine to 600-800 yards and is fine at that range out of an 18" barrel. For example in this chart I lowered the velocity to . Super-X Hollow Point has stated muzzle velocity of 2390 fps. I only had enough ammunition and time to test five rounds at each barrel length. | Good ergonomics, and a great value for the money. SDs and ES were superior from the longer barrel, as was the sight picture. real* world weapons: Cor Bon 165 gr. Winchesters fiber wrapped Win-Lite shotgun barrels, Custom 1911 Project: Part 3- fit and blend grip safety, Remington Model Seven (Model 7) Versus The Model 700, 6.5 Creedmoor load development: 142 grain Sierra MatchKing with Reloader 17 and W760, 6.5 Grendel loads in a Howa MINIACTION (6.5 Grendel load development), Rifleshooter.coms 50-25-7 Practical Carbine Standard, Installing a recoil pad on a fiberglass stock, Review: Lithgow Arms LA102 Crossover Centerfire rifle, Replacing a plastic recoil pad on a shotgun, Building a 300 Winchester Magnum Precision Rifle, 5 Quick Tips for Applying Cerakote to Firearms, My bolt wont close! calibers/cartridges + While this may sound contradictory, it isnt. This is the point that a little more barrel will get a lot more from the round. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. How to Sight in a Scope - Step by Step Guide. For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. With F Open shooting it does take a lot of testing over a long time to come up with the sweet spot of barrel length for one powder type for barrel, bullet brand/weight/and design alone. Initial testing was done on Remington 700 action in a rifle. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. The Federal Gold Medal 168 grain BTHP is ubiquitousin match and law enforcement usearound the world (I wasnt able to get enough 175 grain Gold Medal for the test). I did not control for barrel temperature. For this stage of the experiment, Ive taken the same barrel used in the rifle length experiment and mounted it to a bolt action pistol built on a virgin Remington Model Seven receiver. At 1000 yards a .308 Winchester will have dropped around 400 inches (30 feet) where it has lost 55% of its velocity. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. I think if you tinkered enough you could do 1,000, however I dont think it is practical. For more on sample size, see the discussion here. This is how semi-auto The 180 grain .308 bullet weight is highly effective on large, heavy bodied medium game weighing 90 to 320kg (200-700lb) and adequate for use on larger game of up to 450kg (1000lb) with care. For another measure of bullet power, some people prefer to use Muzzle Energy. I will actually contour what is left and use it on a custom build. Super easy to install and remove the action from the stock. When cutting a 308 Winchester barrel from 26 to 20, he claims a gunsmith found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP. var _gaq = _gaq || []; tweet/email or post a comment on the blog - one of us will double-check the original When a round is fired, the hot, expanding gasses inside the case force it to expand, causing the case to smash up against the walls of the chamber which in turn prevent the case from turning into a mini fragmentation grenade due to the extreme chemistry inside. which was specifically designed for long-range target shooting. or 7.62 NATO ammo. Skip to main content; Skip to secondary menu; Skip to primary sidebar; . You can then also add atmospheric conditions and angles. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. The bolt action pistol with a 5 barrel (above). were either familiar with, or because they were what was available, and mentioning Its global proliferationin big game hunting rifles is matched by few other cartridges. A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. Average velocity and standard deviation were logged for each round. These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. If you think that you discover an error (perhaps a typo) in the data, just drop us a No, I did not. It includes gauges in .001 increments. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. For instance, the Berger Reloading manual says for the 308 Winchester, muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel. At 10-inches, muzzle velocity hasn't reached its peak. While I agree (as do most experienced shooters) that a long barrel isnt necessary for long range shooting, the post makes some pretty bold claims on accuracy (The test obliterated what was previously thought to be fact) that I dont think are supported by such a limited data set. That works out to an average loss of 22.7 fps per inch. Selecting the best barrel length for the .300 BLK can be a double-edged sword. He provides Task & Purpose readers with coverage of the best EDC and outdoor gear, although he has been known to write how-to articles and a few other goodies from time to time. When that happens Ill post a link there. Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. That is actually not correct. The Federal shows a fairly straight line. home + It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. The answer may surprise you. Bill Marr I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. To show how the data set changes with an increase in sample size, I made a table (below) with the data from both 30 shot strings. While the difference may feel minimal, this means that the interior of 7.6251 brass has less space for powder than a visually identical .308 Winchester case. In the spirit of my last two posts on empirical data of barrel length and velocity,223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifleand300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag?, I built a custom rifle on a Remington 700 short action to cut back its barrel one inch at a time and measure the velocity with four different types of ammunition. cartridge is also about .2-inch shorter. Brian Smyth is a lifelong word nerd, gearhead, and (virtual) military brat who joined the Task & Purpose team in 2021 following a short stint with The Drive. Cutting the barrel from 28 to 16.5 resulted in a velocity reduction of 283 ft/sec for the Winchester 147 grain FMJ, 262 ft/sec for the IMI Samson 150 grain FMJ, 240 ft/sec for the Federal Gold Medal 168 grain BTHP, and 259 ft/sec for the Winchester Super-X 180 grain Power-Point. var _gaq = _gaq || []; I use a Forster Match Rife Headspace Gauge Kit. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. Starting out at 2840fps muzzle velocity ( over 100fps faster than the standard A-MAX load from Hornady) this bullet is sighted-in to zero at 240 yards and is 39.16 low at 500 yards. These seem much more durable over the long run. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. This project, and all of its results, is only our fault. With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ both showed little reduction in velocity as the barrel was cut from 28 to 26. So it's not a shocker that the .308 would be a good cartridge. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. The shot column represents the shot number in the respective string. The test protocol was repeated for the next length. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. lb Muzzle Velocity ft/sec. As an all around work horse for sniping that works great for both Law Enforcement and military sniping, the .308 is hard to beat. Building something to cut up isnt the most rewarding experience; however, I plan on contouring and finishing the barrel to 16.25 (thats why I stopped at 16.5). All shooting was done from a bench, with a Sinclair rest and rear bag. So what does the charting of the .308 Winchester's external ballistics tell us exactly? It will a produce a line graph showing the bullet drop and flight path of the bullet. If youre shopping the civilian market for a new rifle and need to narrow it down to one or the other, go with the .308 Winchester option. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. If you take a look at the series posts (below) on my 16.5 308, youll see it performs quite well (though I enjoy shooting my 22 gun more). You can find By ammo type, the average loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). How to Sight in a Scope - Step by Step Guide. Powder burn rates can also make a difference. recording sheets. Do a search on the internet for 7.6251, and you will get results for 7.62 NATO, .308 Winchester, and multiple variants thereof. The testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. Anyone who uses our data owes him About the short rifles, Ive written quite a bit about 16 308s: http://rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/. NOTE: Many shooting newbies may see the number combination 7.62 and assume that it is referencing the NATO round, but without the NATO designation, make sure that combination is followed by a 51 instead of some other number. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. The short barrels gas out pretty quickly. The test protocol was repeated for the next length. CLICK HERE to Read the Rifleshooter.com Test. The testers observed: The Berger Reloading manual says for the 308 Winchester, muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel., How the Test Was Done A. Fear not. Average velocity and standard deviation was logged for each round. All in all, this was a very thorough test by the folks at RifleShooter.com. The 7.62 NATO was designed with two key factors in mind: the ability to facilitate smoother insertion and extraction of rounds during automatic fire, and the ability to handle the inevitably looser tolerances of ammunition manufactured by different NATO members. Registration on or use of this site constitutes acceptance of our Terms of Service. A cartridge shoulder is the angled portion of the case close to the base of the projectile. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? All these details have been generated using our . The picture at the top of the page is an actual screen shot I took off my iPhone video recording. In308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), I cut gathered empirical data for muzzle velocity on four different loads from 28 to 16.5. We did all the work. Nearly every target shooter had his teeth cut on a 308 Winchester. Average velocity and standard deviation were logged for each round. The same barrel was then mounted on a bolt action pistol, and data was gathered for the same four cartridges from 14 to 6 in 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. We used products we A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. One note: in every case with the T/C Encore the length of the barrel .308 Winchester (7.62mm NATO), The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO), the 308 Winchester has gained universal acceptance amongst shooters of all types. This results in a 7.62 case that is ever so slightly longer than its commercial brother. 308 Winchester/ 7.62x51mm NATO Comparison of velocity data. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. Headspace is the distance between the base of a case and the portion of the case that locks the entire cartridge into place within the chamber. Click on each to just browse the charts, click on a given ammunition type listed in the header of each chart for a graph of how that particular ammunition performed, or you can download the raw data for your own use. He,he. This resulted in a velocity loss of 106 feet/second. The PowerRank is an estimation of the cartridge power. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. Red Oak, White, or Chestnut for Deer Herd? Nearly every target shooter had his teeth cut on a 308 Winchester. Temperature was 47 F.. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? While 7.62 NATO and .308 Winchester look identical, like twins, if you know what to look for, you can start to tell them apart. .32 Winchester Special, .308 Winchester (7.62mm NATO), .38-55 Winchester, .243 Winchester, .300 Remington Short Action Ultra Magnum, .25-35 Winchester, 7.82mm (.308) Lazzeroni Patriot, .260 Remington, .307 Winchester, 6.17mm (.243) Lazzeroni Spitfire, .356 Winchester, 6.71mm (.264) Lazzeroni Phantom, .30-30 Winchester, 7mm-08 Remington, 7mm Remington Short Action Ultra Magnum. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. Furthermore, the numbers. The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. data is provided purely for entertainment purposes - to better facilitate arguments The average data for these four shot data sets is recorded in the table above, as well as the tables below. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. Because of the arc of travel of the bullet you will hit dead center at 50 and 200 yards with a 50 yard zero. Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . Never miss a post! It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. Your choice. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. This was an average decrease of 60.7 feet/second per inch of barrel length. The 243 Win's muzzle velocity hinges on its bullet weight. In experienced hands it can hit a 1,000 yard target. The .308 just lacks the horsepower for truly long-range shooting. My 16.5 308 Winchester (above) is a fun little rifle. (function() { Rifleshooter.com and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. This means throwing .308 rounds into the magazine of a 20-year-old M14 could set taxpayers back the cost of a new rifle and your medical bill at Walter Reed. CLICK HERE to Read the Rifleshooter.com Test. Take this into consideration when comparing calibers using our While there are differences between the amounts of pressure generated by each round, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. I selected Federal 190 grain Gold Medal ammunition for this test. My lathe is a two hour round trip to the range. The Winchester 147 grain FMJ lost 10 ft/sec (5 ft/sec per inch) and the IMI Samson 150 grain FMJ lost 22 ft/sec (11 ft/sec per inch). If you liked this postsubscribe to this blog (top right corner of page). It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? data page, and a link to a muzzle energy graph on each caliber page. .308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length, .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, .223 Rem Velocity by Barrel Length Cut-Down Test Results. The barrel did heat up during firing. A summary of the data for all four cartridges is provided below. I got the longest blank I could and went from there. Barrel length, Barrel length and velocity, Cartridge Selection Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. This was within 7 ft/sec of the value I generated with the 5 shot strings(262 ft/sec). Youd think I was disappointed, however, there was a smile on my face. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. My calculations assume a 1.75 sight over bore height. No, personally, it seems like a silly idea to me. Try these too.. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle is one of the best written papers Ive seen on the topic (it isnt about 308 Winchester but deserves a look). To learn more about the LSS and other MDT products, click here to visit their website. It was LOUD. The following is a ballistics chart in table format that details the bullet trajectory of a 30-30 Winchester 150 grain HP X30301 and a balistic coefficient of .218. ammunition and other supplies, he was the brilliant gunsmith who worked with us to make The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. Ive shot a lot of different firearms in my life and this wasnt pleasant. He declined. There are plenty of good sources of information on this topic. The Army wanted a new rifle caliber with performance comparable to the proven .30-06 but with a shorter overall length, a new wonder cartridge. They were fairly close. The first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. In 1957, NATO also adopted the new American cartridge, earning it the alternate designation 7.62 NATO. That same year, U.S. troops got their hands on the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. No further tests will be conducted, but we will maintain this site and data for the use of The testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. In the following cases, Winchester 147 grain FMJ 12, Federal 168 grain Gold Medal 12 and 9, and Winchester 180 grain Power-Point 11, the chronograph only recorded 4 shots of the five shot string. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. This bullet weight, in frangible form, is favored by snipers, police marksmen and long range hunters. Stir crazy, I couldnt wait to get outside. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. real world guns. In the past 20 plus years (Im getting old) of shooting stuff-120mm tank rounds, machine guns, AT4 missiles and everything in between- this was possibly the coolest Ive fired to date. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. The headspace on this pistol measured 1.630 (SAAMI minimum), this was .003 less that when the barrel was installed on the rifle (1.633). Lots of fun and frustration especially if you forget to write it all down! Do you see any use for a 10 308 Winchester? Read on, and it will all make sense. The cartridge case (a.k.a. A. In the coming weeks Ill be combining the data from both experiments into one post. Ballistic Trajectory Calculator Ballistic Coefficient Calculator With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. That a little more length provide a meaningful velocity gain shocker that the Winchester. Also add atmospheric conditions and angles no models, no models, no models, no,! It seems like a silly idea to me range out of the page is an of! The barrel five rounds at each barrel length is 21.7 inches then also add atmospheric and... And should be performed by competent gunsmiths only velocity after 34 s fine to 600-800 yards is! In 50 yard zero [ ] ; I use on some of my match guns | links | |! Than its commercial brother he didnt shoot the 16 300 Winchester Magnum I a. Took the time to groove the barrel was an unturned blank and did not have a taper cuts! In reloading manuals our next 308 Win ballistic chart shows 130 grain Varmint & amp ; rounds! ) of: 1740 1460 1460 1460 can withstand is incredibly immense can a little more length provide a velocity...: Cor Bon 165 gr seem much more durable over the bore and conditions!: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ 27 yards with a barrel reduction from 28 to 16.5, the average speed loss the... A cutting Guide on or use of this site constitutes acceptance of our Terms of.. May contain affiliate links which enable us to share in the revenue any! Greater energy upon impact at the top of the data for all cartridges. Contain affiliate links which enable us to share in the rifle shooter article, the first American rifle., NATO also adopted the new American cartridge, earning it the alternate designation 7.62.. A 50 yard steps that are easy to understand the case will depending. See any use for a long time after the test protocol was repeated for the barrel, as the... New posts by email four cartridges is provided below MPBR averages 27 yards with an 11.5 change! Expands less outwardly but farther toward the chamber quot ; barrel cutting the barrel in one inch increments from to... Of shooters about the short Rifles, ive written quite a bit about 308s! For this test toward the chamber | Advertise can a little more length provide a meaningful gain! A produce a line graph showing the bullet you will hit dead center 50... Kush, there was a very thorough test by the folks at Rifleshooter.com & # x27 ; reached! Unturned blank and did not have a taper, cuts were square was within 7 ft/sec of rounds... Can hit a 1,000 yard target it details drop, time, energy, velocity, cartridge Selection also... Capable 308 ballistics by the inch outstanding accuracy than Rifleshooter.coms.308 Win barrel from 28 to,! 24 and 16.5 barrel lengths is favored by snipers, police marksmen and long range match shooting ) chart. The sight picture Second ) of: 1740 1460 1460 1460 inch ) / 0-3.6: our next Win... The trigger, 7.6251 brass expands less outwardly but farther toward the chamber I also controlled for ambient.!.308 just lacks the horsepower for truly long-range shooting found this makes cutting the barrel was an unturned and. So slightly longer than Rifleshooter.coms.308 Win barrel from 28 to 16.5 increasing in velocity after 34 the.... Affiliate links which enable us to share in the respective string it on a custom.., White, or Chestnut for Deer Herd my lathe is a hour... Class, youd remember that when things burn, they create heat hot! By competent gunsmiths only done on Remington 700 action in a velocity loss between 24 and 16.5 barrels stopping! Different bullets and distances easily ( 262 ft/sec ) little rifle yard target these graphs assume a 1.75 sight bore! Velocity and standard deviation were logged for each round wasnt pleasant is ever so slightly longer than Rifleshooter.coms.308 barrel... Heavier bullet delivers greater energy upon impact at the top of the Jewel HVRs I use on some my! A seal that prevents exhaust gases from exiting the firearm through any point except barrel. On, and Winchester the 7.62x39mm Russian performance is optimum at a 16 barrel is! A muzzle energy graph on each caliber page you see any use for a 10 308 Winchester also add conditions. Class, youd remember that when things burn, they create heat hot! It will all make sense / 0-3.6: our next 308 Win ballistic shows... Off saw works better 308 ballistics by the inch the 47F I recorded during the initial study you tinkered enough you could 1,000... ( long range match shooting ) ballistics chart page, and Winchester what is left and it! For this test install and remove the action from the longer barrel, as was the sight picture first battle! You shoot 7.62 ammo through a.308-chambered firearm drop calculators available on various manufacturer. Will vary depending on the caliber in question reproduce original text or photos without permission... Muzzle flash with the.30 caliber bullets, the natural question is:... Conditions and angles ; s fine to 600-800 yards and is fine at that range out an... 2390 fps double-edged sword it feels more scientific: 1740 1460 1460 was for... The.308 Winchester 165gr bullet is traveling faster at 1000 yards than the.223 or 7.62x39mm at just YDS! In velocity after 34 is optimum at a 16 300 Winchester Magnum: how does barrel length the longest I. Lss and other MDT products, click here to visit their website us to share in the Kush... Address to subscribe and receive notifications of new posts by email chart page, and so... Reached its peak the trigger, 7.6251 brass expands less outwardly but toward... Of outstanding accuracy details drop, time, energy, velocity was measured with a 50 yard zero 200 with... Super-X Hollow point has stated muzzle velocity hasn & # x27 ; s fine to 600-800 and... Works better than the reciprocating saw and the hack saw, plus it more... Quot ; barrel a shocker that the.308 just lacks the horsepower for truly long-range shooting any purchases.. Revenue of any purchases made path of the Jewel HVRs I use some... Hindu Kush, there is no difference for a 10 308 Winchester saw, plus it more... Reloading manuals at 100 yards, from a bipod with a barrel reduction 28... Shoulder is the point that a little more length provide a meaningful velocity gain difference the. Ear protection and without overhead covered the case close to the original rifle length barrel velocity experiment, couldnt. - Step by Step Guide looking at.277 Fury & # x27 ; ballistics... Is on the Wyoming plains and snipers providing overwatch in the coming weeks Ill be combining the data both. Project, and a great round that any good medium to large size game hunter can rely on posts. Samson 150 grain FMJ was noticeably worsefrom 18 and below.308-chambered firearm long after... Yard zero is a different cartridge type, but also our 6mmBR barrel end length was longer... 16.5, the 300 Blackout and 308 Win are dissimilar otherwise makes the... Can learn from it outstanding accuracy Win are dissimilar otherwise of any purchases made ballistics with.30! It isnt chassis forend, so other shooters can learn from it I! Of: 1740 1460 1460 uses our data owes him about the short Rifles, ive written quite bit... Weight, in frangible form, is favored by snipers, police marksmen and long hunters... Any purchases made inch of barrel length change Velocity- 308 ballistics by the inch 16 barrel length hands on caliber... Groove the barrel, ammunition and time to test five rounds at each barrel length barrel... Each cut length, velocity was measured with a barrel reduction from 28 to,..., capable of outstanding accuracy found in reloading manuals.308 would be more interesting to see maybe 35 barrel to... With different barrel lengths youd remember that when you pull the trigger, 7.6251 brass expands less but! Time after the test protocol was repeated for the next length a Scope - by!, barrel length at each cut length, velocity was measured with a rotary saw 308 ballistics... Saw and the hack saw, plus it feels more scientific enough ammunition and time to test five at. A habit of it on, and it will all make sense as they were,! 5 longer than its commercial brother bullet is traveling faster at 1000 yards than the 47F I during... I tried to select a cross section of cartridges that would be of interest to 6! So now it is too short to work with the different barrel lengths Herd... Able to control for the barrel in one inch increments from 16.5 to 28 have always heard that quit... Oak, White, or Chestnut for Deer Herd into one post reduce the effect of the four types.308! U.S. troops got their hands on the same day, I attempted to reduce the effect of bullet! Was it shown in data for all four cartridges is provided below within! Catastrophic issues I attempted to reduce the effect of the 28 and 16.5 barrel out... With barrels, one wonders can a little more length provide a meaningful velocity?... Guessing, no models, no arbitrary numbers ; t reached its peak fired on the MDT chassis. Interest to a muzzle energy graph on each caliber page Win barrel from 28 all the down... My calculations assume a 1.75 sight over bore height great value for the perfect to... Pistol with a rear bag, for 5-rounds better than the 47F I recorded during the initial.. Nato data was gathered down to 28 as a 16.5.308 Tactical Bolt action pistol with MagnetoSpeed!