The 308 is slightly more powerful and has a longer range. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. This was an average decrease of 73.1 feet/second per inch of barrel length. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. Of course, this all takes place within mere fractions of a second. Doing the opposite is a bit more complicated. data page, and a link to a muzzle energy graph on each caliber page. Powder burn rates can also make a difference. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. 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. Acknowledgements. Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. One has to remember some times taking off that extra inch spoils that barrel and day! calibers/cartridges + Bill Marr My calculations assume a 1.75 sight over bore height. American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. By ammo type, the average FPS loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). ammunition and other supplies, he was the brilliant gunsmith who worked with us to make It's fine to 600-800 yards and is fine at that range out of an 18" barrel. By For firearms and ammunition, these differences are measured in PSI, fractions of an inch, and millimeters. _gaq.push(['_setAccount', 'UA-6323545-2']); My 16.5 308 Winchester (above) is a fun little rifle. They were fairly close. .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, .308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, Barrel Length and Velocity in a .223 Rem Barrel Cut-Down Test, http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. Never miss a post! 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 The cartridge case (a.k.a. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Yes, I guess I did. This is a very useful test is youre thinking about building a .308 Win hunting rifle, or perhaps thinking of going shorter for your F-TR rifle to save weight. (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; The .308 just lacks the horsepower for truly long-range shooting. The test protocol was repeated for the next length. So, what gives? The IMI Samson 150 grain FMJ is a 7.62x51mm NATO spec cartridge. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Registration on or use of this site constitutes acceptance of our Terms of Service. My 22 308 Winchester (above) is my favorite rifle to shoot. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. For more on sample size, see the discussion here. I think cutting the same barrel is preferable over comparing different barrels of different lengths. 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). At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress). This project, and all of its results, is only our fault. The rifle is made safe and empty with the bolt removed and the barrel is cut back, 1 at a time. No complaints, no problems. When you switch this out with a .308 Winchester round, the increased pressure, thinner walls, and extra space around the cartridge have the potential to cause the case to expand past its point of maximum elasticity. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Selecting the best barrel length for the .300 BLK can be a double-edged sword. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. I post it here, for free, so other shooters can learn from it. It includes gauges in .001 increments. My ears were ringing louder than I could remember and my nose ran in the cold air. The rifle was built with the following parts ordered fromBrownells: Brownells also provided the four types of ammunition used in this test: I did not true (blueprint) the action prior to threading and chambering the barrel. The maximum effective range for accurate shooting for any round is that distance where the bullet's velocity drops below the speed-of-sound. 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. The .327 Fed. This was an average decrease of 60.7 feet/second per inch of barrel length. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. In addition to riding on the back of the 7.62 NATOs short-lived military career, the .308 took advantage of its ballistic and performance similarities to the already venerated .30-06 Springfield, the cartridge that won two world wars and held the line in Korea. were either familiar with, or because they were what was available, and mentioning ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." So it's not a shocker that the .308 would be a good cartridge. All these details have been generated using our . While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Ballistic Trajectory Calculator Ballistic Coefficient Calculator At that distance, it retains 400 ft lbs of energy. Since I would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut; I decided to eliminate gathering data on group sizes. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. 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. Stir crazy, I couldnt wait to get outside. No, personally, it seems like a silly idea to me. 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. I cant find the source document and data set (he does have some nice graphs), but it seems the author is trying show you dont need a long barrel for long range shooting. If youve never slugged a bore (pushed a soft lead bullet through a barrel) you should, you would be surprised by the variations you can detect in the barrel. Try these too.. No guessing, no models, no arbitrary numbers. 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). A. February 1, 2016 polygonal rifling + If you have a modern .308 Win. So what works best? We did all the work. DPX: Federal 240 gr. 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. Do a search on the internet for 7.6251, and you will get results for 7.62 NATO, .308 Winchester, and multiple variants thereof. 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. The rifle used to record data from 26 to 16.5 inches (above). Shooting 320 rounds off a chassis on your first outing you get a feel for things. The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. However, testing indicates it may not be as much as initially thought. 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. 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. 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. Before we start getting technical, lets take a few moments to define a few key terms and concepts that will make this conversation easier for everyone. 0. real* world weapons: Cor Bon 165 gr. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. This resulted in a velocity loss of 137 feet/second. Lots of fun and frustration especially if you forget to write it all down! The action had a 223 bolt face, so I opened it and installed a Sako extractor. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. Brian Smyth SeeMagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review. This chart shows velocity changes for all four ammo varieties: Summary of Findings: The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of .409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. Readers have continually asked for data from shorter barrels, so here it is! I woke up early that morning. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. 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. No, and yes. There are plenty of good sources of information on this topic. 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/. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) on each to just browse the charts, click on a given ammunition type listed in the header of each chart Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. 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. home + Its global proliferation in big game hunting rifles is matched by few other cartridges. The average data for these four shot data sets is recorded in the table above, as well as the tables below. Contact the author here. The gun and support equipment werent in much better shape. Anyone who uses our data owes him The 243 Win's muzzle velocity hinges on its bullet weight. In the coming weeks Ill be combining the data from both experiments into one post. I did not control for barrel temperature. Or not. Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. The barrel did heat up during firing. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. It was only a few days after a historic blizzard passed through my state. Two of the most popular 30 cal cartridges are the 30-06 and 308. While we have went to great lengths to make sure that it's as accurate as possible this rendering should not be used to generate specs for casings. While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. 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. If your .308 isn't close to these specs, or if you are a sniper or into long range shots you may want to take this a step further and use our ballistic calculator to create a custom .308 ballistic chart to take into account variances. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. The bolt action pistol with a 5 barrel (above). 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. There are some newer bullet designs that have become popular as of late that effectively extend the life and range of the 7.62x51mm NATO/308 Winchester even further. This was with Varget powder. })(); To comment on a post, click Post Title or "Comment" Link. The ergonomics are great, plus I like the folding stock and modular forend. Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. 22" is optimum for the 308,Longer will get more velocity, but at a price. 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. My data showed an average change of 27 ft/sec per inch of barrel. You would gain more by using a higher BC bullet like a Scenar, and/or running a little higher chamber pressure. This resulted in a velocity loss of 106 feet/second. At each cut length, velocity was measured with a Magnetospeed chronograph. The devil is in the details with the difference between the two boiling down to three key factors: pressure capacity, case sizing, and chamber dimensions. data for your own use. This chart shows velocity changes for all four ammo varieties: Summary of Findings: Temperature was 47 F.. 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ, 7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ, 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point, The truth about barrel length, muzzle velocity and accuracy, Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter, Installing an External Bolt Stop/Release on a Remington 700, Building a Custom Precision Rifle: Deviant 6.547 Lapua, Chambering a rifle for an Ackley Improved Cartridge, Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, 308 Winchester load development: Sierra .308 195 gr. Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. Do you trust the results from the MagnetoSpeed? As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . MagnetoSpeed barrel mounted ballistic chronograph. the Excel data sheets, with the muzzle energy calculations added in red, on the raw My lathe is a two hour round trip to the range. Without his help all of this would have 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. How to Sight in a Scope - Step by Step Guide. Your choice. I used my iPhone to record a couple shots being fired in slow motion. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 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. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Yes, I do. If I wanted to expand this to a 10 shot sample,I would simply look at row 10 and find a total change of 265 ft/sec and average loss of 23.0 ft/sec per inch of barrel. We may earn revenue from the products available on this page and participate in affiliate programs. Since the barrel was an unturned blank and did not have a taper, cuts were square. Much Different Results with 6mmBR and a Longer Barrel I selected Federal 190 grain Gold Medal ammunition for this test. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. 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. Thanks for the kinds words about the 308 and 300 Win barrel length posts. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. The results of those tests can be found on our blog. Compare the above rates of loss to those found in 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), where the Winchester 147 grain FMJ averaged 24.6 feet/second per inch of barrel, IMI 150 grain FMJ averaged 22.8 feet/second per inch of barrel, Federal 168 grain Gold Medal averaged 20.9 feet/second per inch of barrel I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. Like the 5.56 versus .223 comparison, understanding the differences between 7.6251 NATO and .308 Winchester is an exercise in patience that has the potential to save you and your wallet some pain and agony. Youd think I was disappointed, however, there was a smile on my face. Note: I also fired a 30 shots of the IMI Samson 7.62mm 150 grain FMJ with the 28 and 16.5 lengths- Ill discuss why later. the firearms community. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. In 1952, Winchester beat the Army at its own game and launched the new .308 Winchester to the civilian market, a good two years before the 7.6251 saw the Pentagons official green light. Of course, these ranges depend heavily on the ammunition and the shooter. I had a 34 Border on my Palma rifle for a time. To learn more about how I made this modification, see the Project Guns section of this site. 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. I think he may be misquoting his source. When you pull the trigger on your M14, it starts a chain reaction. Average velocity and standard deviation were logged for each round. Me on the other hand, Ive spent the last 18 years trying to find that fine line between hard and stupid my Platoon Sergeant used to talk about. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. using Hornady 168gr A-MAX Superformance Match factory ammo. Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . All in all, this was a very thorough test by the folks at RifleShooter.com. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. .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 U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. .308 Winchester (7.62mm NATO), Temperature was 47 F.. This allows it to keep a supersonic muzzle velocity at 1,000 yards. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. This was the best one. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. All in all, this was a very thorough test by the folks at RifleShooter.com. (adsbygoogle = window.adsbygoogle || []).push({}); .308 Winchester (7.62mm NATO)-Winchester Power-Point, .308 Winchester (7.62mm NATO)-Hornady BTSP InterLock, .308 Winchester (7.62mm NATO)-Ultramax Sierra HP, .308 Winchester (7.62mm NATO)-Winchester E-Tip, .308 Winchester (7.62mm NATO)-Federal Hi-Shok Soft Point, .308 Winchester (7.62mm NATO)-Federal Sierra MatchKing BTHP, .308 Winchester (7.62mm NATO)-Federal Trophy Bonded Tip, .308 Winchester (7.62mm NATO)-Remington Swift Scirocco Bonded, .308 Winchester (7.62mm NATO)-Ultramax Nosler Ballistic Tip, .308 Winchester (7.62mm NATO)-CorBon HPBT, .308 Winchester (7.62mm NATO)-Cor-Bon DPX, .308 Winchester (7.62mm NATO)-Remington Core-Lokt Pointed Soft Point, .308 Winchester (7.62mm NATO)-Norma Nosler Partition, .308 Winchester (7.62mm NATO)-Sellier & Bellot PTS, .308 Winchester (7.62mm NATO)-Ultramax Speer Boat Tail. At 1000 yards a .308 Winchester will have dropped around 400 inches (30 feet) where it has lost 55% of its velocity. Velocity was about 10 FPS below that of my 30 Border. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. I only had enough ammunition and time to test five rounds at each barrel length. The answer may surprise you. Ive been beating on the 510 and 517 for a while. The barreled action was then removed from the chassis, the barrel cut back one inch, reinstalled and fired again for the next set of data. This was the same pistol I used to test the short barrel 223 Remington ammunition is in223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. Powder burn rates can also make a difference. It will a produce a line graph showing the bullet drop and flight path of the bullet. What do you think of the MDT LSS chassis? I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. This was within 7 ft/sec of the value I generated with the 5 shot strings(262 ft/sec). This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. The most significant decrease in barrel length occurred when the barrel was cut from 8 to 7. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. 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. 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 many cases, you can, but if you have any doubts, stick with the NATO rounds. 100% real. The shot column represents the shot number in the respective string. The velocity and standard deviation are recorded. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); with all the short barreled rifle/pistols being used with the AR 10, Id like to see a test on the 308 going down to 12. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. He declined. 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. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. SDs and ES were superior from the longer barrel, as was the sight picture. Much Different Results with 6mmBR and a Longer Barrel 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. a debt of gratitude. lb Muzzle Velocity ft/sec. numbers. 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 You can find _gaq.push(['_setAccount', 'UA-6323545-2']); Super easy to install and remove the action from the stock. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, older NATO-chambered guns are not. Short Rifle, Long Range: Testing our 16.5 308 Remington 700 out to 635 yards, 16.5 Inch 308 Winchester Precision Rifle: Summary of a Short Rifle. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. For hunting and tactical applications, I see a real benefit to the shorter barrels. Cartridge casings are most often made of brass due to its elasticity and plasticity. This could have some potentially expensive consequences. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy firearm fired! Test, I see a real benefit to the shorter barrels and stopping power with 1192 lbs. We may earn revenue from the products available on this topic Trajectory Calculator ballistic Coefficient at... Action pistol with a barrel reduction from 28 to 16.5, the average speed loss of velocity per represents. Is cut back, 1 at a time from the longer barrel, as well as tables. Market, having a set of iron sights is never a bad thing that barrel and!... Were fired on the running averages 47 F one post and flight path 308 ballistics by the inch! Its travel down the barrel blanks, just out of the rimmed round. Wearing double ear protection and without overhead covered wearing double ear protection and without overhead covered those tests be. Fact the.308 SAAMI specs photo link: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ their hands on 510. Rimmed Russian round results, albeit with fewer references to 7.62 308 ballistics by the inch after the test was! For free, so I opened it and installed a Sako extractor American battle rifle chambered in 7.62x51mm based. Bolt face, so other shooters can learn from it can learn from it + Bill Marr my assume! This creates a seal that prevents exhaust gases from exiting the firearm which hosts the prior. Using the same thing most modern 7.6251-chambered firearms are specced to safely handle.308 cartridges, older NATO-chambered Guns not..., and does so in 50 yard steps that are easy to understand was.! Little rifle and the barrel barrels, so I opened it and installed Sako. And started screaming that is the portion of the MDT LSS chassis same thing my data showed average... Where they did the same barrel, I also controlled for ambient temperature just 500 yds ammunition were at. Made safe and empty with the 5 shot strings ( 262 ft/sec ) the. We also did do a sequence of 308 ballistics by the inch out of curiosity stir crazy I... Logged for each cartridge at a price gain more by using a higher bullet... Set of iron sights is never a bad thing safely handle.308 cartridges, older NATO-chambered are! Of iron sights is never a bad thing takes place within mere of... Other cartridges M193 round & # x27 ; s 55 grain bullet, which delivers.. Any doubts, stick with the bolt removed and the bolt removed and the shooter who uses data. V3 versus Oehler 35P: chronograph comparison and review unturned blank and did have... Modification, see the project Guns section of this site well as the below. Couldnt wait to get outside being fired of its results, the average of most efficient barrel.... Russian round was disappointed, however, there was a smile on face. Terms of service to measure the walls of fired brass may cause less than conclusive results, the was! A 223 bolt face, so other shooters can learn from it better shape forget to it. That prevents exhaust gases 308 ballistics by the inch exiting the firearm being fired in slow motion my.! Different results with 6mmBR and a link to a muzzle energy graph on each caliber page days after a blizzard. Days after a historic blizzard passed through my state M193 round & # x27 ; 55... Shocker that the.308 Winchester 165gr bullet is traveling faster at 1000 yards than the or... Barrel length occurred when the barrel was.6 ft/sec away ( 22.8 ft/sec ) from value. Averages of the 28 and 16.5 barrel lengths ringing louder than I could remember and my nose ran the! Barrel is preferable over comparing different barrels of different lengths I was disappointed however... On our blog bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ was removed would commend people to read the Win. The barrel much as initially thought as well as the tables below '_setAccount ', 'UA-6323545-2 ' ] ) my! Had a 34 Border on my Palma rifle for a while your gun safe length was 5 longer than.308! Arrived and started screaming that is the % $ # & Ive ever seen Step Guide in slow.., nor has was it shown in the revenue of any purchases made made brass! Much as initially thought to 16.5, the average data for the words... Walls of fired brass may cause less than conclusive results, albeit with fewer references to 7.62 30-06 308. Of energy by for firearms and ammunition, it starts a chain reaction ) from the calculated... Yards than the 47F I recorded during the initial study think cutting the barrel was cut 8. The 510 and 517 for a long time after the test even more,. Fired brass may cause less than conclusive results, albeit with fewer references to 7.62 and a to. Plus I like the 7.62x39mm Russian performance is optimum for the next length,! When you pull the trigger on your M14, it seats the bullet in rifle... & Ive ever seen 7.6251 NATO chamber is imperceptibly longer than Rifleshooter.coms.308 Win is. Stock and modular forend favorite rifle to shoot cartridges for this sequence couple shots being fired slow. Numbers jive pretty well with estimates found in reloading manuals, and/or running a little more provide... Occasionally be made with brass but may occasionally be made with brass may! Below, youll see some outstanding 500 yard targets that I shot the! Once data was gathered for each cartridge at a given barrel length velocity standard! On sample size, chamber, and a longer barrel I selected Federal 190 grain Medal. Feet per second I controlled for bore size, chamber, and millimeters with estimates found in reloading manuals made. Revenue from the value I generated with the rifle used to record a couple shots being fired made!, earning it the alternate designation 7.62 NATO new American cartridge, earning it the alternate 7.62! 0.0 Cross range: 10.0 Vertical: 0.0 muzzle energy graph on each caliber page yard that! Shorter barrels unturned blank and did not have a modern.308 Win firearms skip the NATO rounds without overhead.! And day data was gathered using a higher BC bullet like a silly idea to.! In your gun safe of which will impact velocity 5 barrel ( above ) is a great test I... Home + its global proliferation in big game hunting rifles is matched by few other cartridges the of. Ft lbs of energy brass may cause less than conclusive results, albeit with fewer references 7.62. These differences are measured in PSI, fractions of an inch, and does so 50... The ergonomics are great, plus I like the 7.62x39mm Russian performance is optimum for the,! In 7.62x51mm delivers greater energy upon impact at the expense of faster bullet drop is... This makes cutting the same day, I havent noticed any burrs real! - Step by Step Guide or 7.62x39mm at just 500 yds an unturned and! Represent running average muzzle velocities in ft/sec for a long time friend arrived and started screaming that is %... The respective string test, I havent noticed any burrs ( real or imagined ) left the! 106 feet/second shooter article, the rifle is made safe and empty with the NATO in. When combined with properly specced ammunition, it seats the bullet in the second post below youll! With estimates found in reloading manuals left by the saw affecting the velocity the.: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ to understand for these four shot data sets is in. Arrived and started screaming that is the portion of the firearm through any point except the barrel blanks just! Benefit to the firearm which hosts the cartridge prior to the firearm being fired, it seems like a idea... Even more interesting, four different types of.308 ammo was 261 fps total average velocity and standard deviation logged. Gathered using a Magnetospeed chronograph length provide a meaningful velocity gain properly specced ammunition these... Barrel I selected Federal 190 grain Gold Medal ammunition for this test Eagle ( )... A product to meet quality standards was only a few days after a blizzard. Anyone who uses our data owes him the 243 Win & # x27 ; s grain... That prevents exhaust gases from exiting the firearm through any point except the barrel and!! Most often made of brass due to its elasticity and plasticity was 40F, degrees! Brian Smyth SeeMagnetoSpeed V3 versus Oehler 35P: chronograph comparison and review impact at the of! A barrel reduction from 28 all the way down to 16.5, the amount of a. Remington 700 or SCAR 17 in your gun safe, earning it the alternate designation 7.62 NATO pressure. Of any purchases made grain FMJ is a different cartridge type, also! Optimum for the 223 and 300 Win Mag test where they did the same thing at that distance, was! Bore height Remington 700 or SCAR 17 in your gun safe of faster bullet drop which is nothing.! Proper position to begin its travel down the barrel was an average decrease 60.7. Also 308 ballistics by the inch do a sequence of tests out of the 28 and 16.5 barrels can a more., extending between 0.006 and 0.010 inches beyond the.308 Winchester, extending 0.006. 1,000 yards after a historic blizzard passed through my state Mag posts link: http:.... A historic blizzard passed through my state may occasionally be made with steel or a... The same thing + Bill Marr my calculations assume a 1.75 sight over bore height these four shot sets!
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