However, testing indicates it may not be as much as initially thought. 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. 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). Enter your email address to subscribe and receive notifications of new posts by email. calibers/cartridges + Stir crazy, I couldnt wait to get outside. 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. 22" is optimum for the 308,Longer will get more velocity, but at a price. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. There are plenty of options from which to choose. It will a produce a line graph showing the bullet drop and flight path of the bullet. Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. February 1, 2016 Readers have continually asked for data from shorter barrels, so here it is! At each cut length, velocity was measured with a Magnetospeed chronograph. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. Is the file picture at the top of the page real, or photoshopped? While this may sound contradictory, it isnt. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? Without his help all of this would have I just touched off a 308 Winchester in a 6 long bolt action pistol, the final round of my 308 barrel length testing, and couldnt be happier. Your choice. If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. It helped pave the way for the successful powder company that exists today. 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 stage was conducted on pistol built on a Model Seven action (note, you cant convert rifles to pistols in the US, to make a pistol you need to start with a virgin receiver that has never been a rifle). 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester 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. var _gaq = _gaq || []; The barrel length for a 308 can be anywhere from 16 to 24 inches, while the barrel length for a AK-47 in caliber is typically 16 inches. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. Red Oak, White, or Chestnut for Deer Herd? The picture at the top of the page is an actual screen shot I took off my iPhone video recording. Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. The cartridges bullet is seated inside the top rim of the case (called the neck), and the primer is seated in a recess at the bottom of the case. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. Ballistics Rifle Ballistics Ammo Description Velocity (fps) Energy (ft/lb) Trajectory Tables (inches) CARTRIDGE BULLET ITEM # MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd V 17 Mach 2 15.5 gr. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. I post it here, for free, so other shooters can learn from it. 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. .357 SIG, .38 Super Auto Colt, .35 Whelen, .300 Remington Ultra Magnum, .35 Remington, .44 Smith & Wesson Special, .380 Auto (9mm Browning Short), 10mm Auto, .25 Winchester Super Short Magnum (WSSM), .303 British, 6.5x54 MS (6.5 Mannlicher-Schoenauer), .300 Remington Short Action Ultra Magnum, .218 Bee, 6.8mm Remington SPC, .25-20 Winchester. At each cut length, velocity was measured with a Magnetospeed chronograph. The brand new, factory AI AICS magazine also flew apart as few times. You can find For another measure of bullet power, some people prefer to use Muzzle Energy. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. 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. I got the longest blank I could and went from there. To learn more about how I made this modification, see the Project Guns section of this site. Brian Smyth Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . Enter your email address to subscribe and receive notifications of new posts by email. This was with Varget powder. which was specifically designed for long-range target shooting. 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. })(); To comment on a post, click Post Title or "Comment" Link. Create Your Free Custom Ballistic Report Liked this? It's fine to 600-800 yards and is fine at that range out of an 18" barrel. 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. 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. One has to remember some times taking off that extra inch spoils that barrel and day! By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. Here is a list of all 23 different data sets we have tested. 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. No, personally, it seems like a silly idea to me. 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. CLICK HERE to Read the Rifleshooter.com Test. 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. 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. This is the point that a little more barrel will get a lot more from the round. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. We may earn revenue from the products available on this page and participate in affiliate programs. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. At the urging of the federal government, the Small Arms and Ammunition Manufacturers Institute (SAAMI) was founded in 1926 as an association of the nations leading manufacturers of firearms, ammunition and components. The organization is tasked with creating, standardizing, and publishing technical firearms and ammunition data in order to promote quality, reliability, interchangeability, and safety within the firearms manufacturing and shooting communities. When that happens Ill post a link there. Are 7.62 NATO (a.k.a. The chill from my snow covered feet started to make its way up my legs and into my back. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. ga.src = ('https:' == document.location.protocol ? He,he. We used products we It was only a few days after a historic blizzard passed through my state. 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). home + If you think that you discover an error (perhaps a typo) in the data, just drop us a Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) The bolt action pistol with a 5 barrel (above). Average velocity and standard deviation was logged for each round. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. You would gain more by using a higher BC bullet like a Scenar, and/or running a little higher chamber pressure. This was an average decrease of 81.7 feet/second per inch of barrel length. While the external dimensions of both 7.6251 and .308 cases look identical, there are virtually imperceptible differences which, when combined with the differences in the two different chamber dimensions, result in different headspacing for each caliber. 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. 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. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. The results from Rifleshooter.coms .308 barrel cut-down test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. If you liked this postsubscribe to this blog (top right corner of page). _gaq.push(['_setDomainName', '.accurateshooter.com']); 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. This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. According to multiple non-scientific studies, the average .308 case weighs in around 160 to 170 grains each, while 7.62 brass usually comes in at over 180 grains apiece. The locking portion of the case will vary depending on the caliber in question. We did all the work. .308 Winchester (7.62mm NATO), 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. All shooting was done from a bench, with a Sinclair rest and rear bag. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? The thing I found most interesting , is the lines show the consistency of the ammunition ! The .327 Fed. tweet/email or post a comment on the blog - one of us will double-check the original The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. The short answers to these questions are yes and maybe. The PowerRank is an estimation of the cartridge power. The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. .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. Share the post ".308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test", Tags: .308 Win Barrel, Bill Marr Gunsmith, Cut-Down Test, Rifleshooter.com, Velocity barrel length, With the advent of internal Ballistics Simulators such as GRtools, MV per barrel length and MV per grain is just a simulation outcome. I think data sets are great. I use a Forster Match Rife Headspace Gauge Kit. All 7.6251 rounds are cool for use in the proper NATO weapon, but 7.62x39 is the original caliber of the infamous AK-47. Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. I had a 34 Border on my Palma rifle for a time. Super easy to install and remove the action from the stock. Its global proliferation in big game hunting rifles is matched by few other cartridges. 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. I selected the Winchester Super-X 180 grain Power-Point as a representative hunting cartridge. The rifle is fine. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. Troubleshooting seized ejectors. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. There are plenty of good sources of information on this topic. So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. 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. Since we first launched BBTI in November of 2008, it has become a primary reference tool for firearms enthusiasts of all stripes and from around the globe. The barrel was cut off using a cold saw. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. The test protocol was repeated for the next length. 2/1/16- Short barrel information can be found at: 1/24/15- Complete data sets for each cartridge can be found in the following posts: We ran the 147, 150 and 168 grain loads for 28, 24, 20 and 16.5 barrel lengths out to 1,000 yards (optimisticdistances for the 147 and 150 grain loads). Last week I found out Cerakote has a color called USMC Red. The small sample size is always an issue. I woke up early that morning. *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. brass or casing) is the shell of a firearms cartridge that houses the propellant. The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. This was the best one. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. This project, and all of its results, is only our fault. the cylinder gap. Selecting the best barrel length for the .300 BLK can be a double-edged sword. The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. performance comparable to the proven .30-06 but with a shorter overall length, the Army experimented with a variant of the .300 Savage that is designated the T65, a good two years before the 7.6251 saw the Pentagons official green light, NATO also adopted the new American cartridge, the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm, check out this article by Bison Ballistics, For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt, an association of the nations leading manufacturers of firearms, ammunition and components, measured in PSI, fractions of an inch, and millimeters, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000, 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), handle the inevitably looser tolerances of ammunition manufactured by different NATO members, 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, can cause significant damage to your magazine, chamber, and/or person, While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, 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. We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. Mag. Average velocity and standard deviation were logged for each round. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. While U.S. military snipers and dedicated marksmen use a variety of different calibers, it appears the 7.6251 is here to stay for the foreseeable future. For firearms and ammunition, these differences are measured in PSI, fractions of an inch, and millimeters. This resulted in a velocity loss of 94 feet/second. .277 Fury has a -41 inch drop at 500 yards . Bill Marr This could have some potentially expensive consequences. Powder burn rates can also make a difference. Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. Based on my limited experience with the 330 BLK and 7.62x39mm Russian (which are ballistically very similar to each other), I would guess a 10 308 with 150 grain bullets would give you similar velocities with a 125 grain projectile with far less blast and concussion. Temperature was 47 F.. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. _gaq.push(['_setAccount', 'UA-6323545-2']); Headspace was measured at 1.633+ (.003 over minimum). 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. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. Yes, I guess I did. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) rifle, you should be fine firing any modern commercial .308 Win. The IMI 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length decreased from 15 to 6. These seem much more durable over the long run. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. While you can get close estimates to anticipated velocities by examining anecdotal accounts from different shooters and looking over load manuals, the data gathered in an actual experiment provides a baseline that can help inform your decision making process. 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. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. Until then, stay safe. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. Heavy, subsonic ammo in a 10-inch barrel experiences low velocities, the tradeoff is the ability to not damage your hearing while using a suppressor. And more importantly, will one blow up a gun in your face when used in the other? I think if you tinkered enough you could do 1,000, however I dont think it is practical. Of course, these ranges depend heavily on the ammunition and the shooter. 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. Maybe he meant negligible? While the .308 Winchester is the civilian competitor and is frequently employed in hunting rifles and military replica firearms, such as the M14 (Springfield Armory M1A), AR-10/SR-25 (multiple civilian variants), and FN SCAR-H (SCAR 17). This resulted in a velocity loss of 137 feet/second. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). To learn more about the LSS and other MDT products, click here to visit their website. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; The bullet does not drop below the speed within . They were fairly close. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. 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. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. The most significant decrease in barrel length occurred when the barrel was cut from 10 to 9. 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. ga.src = ('https:' == document.location.protocol ? The chops tests ranged in barrel length from 18" down to 3". Remington Model Seven Actions are available! That works out to an average loss of 22.7 fps per inch. I used my iPhone to record a couple shots being fired in slow motion. This was noticeable from 19 inches and below. Share the post ".308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length", Tags: .308 Win, 7.62x51 cut-down test, Barrel, Rifleshooter.com, Saw, Velocity. Comparing the data from the 30 shot strings (28 2824 and 16.5 2555) to the 5 shot strings (28 2823 and 16.5 2561) I found a loss of 269 ft/sec (23.4 ft/sec per inch) as the barrel was cut. I like it a lot. Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. 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. My 16.5 308 Winchester (above) is a fun little rifle. was measured from the end of the barrel back to the breech face. In 2009 an additional three calibers were tested and in 2010 and . The barrel did heat up during firing. 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. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. on each to just browse the charts, click on a given ammunition type listed in the header of each chart 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. Doing the opposite is a bit more complicated. Published Mar 29, 2021 12:55 PM EDT. So it's not a shocker that the .308 would be a good cartridge. Yards and is fine at that range out of 20 power rank using our algorithm cross range 10.0. Prior to the firearm being fired in slow motion 94 feet/second will impact velocity see maybe 35 barrel down 28! 5 shot strings 308 ballistics by the inch which enable us to share in the narrow [ ], without a doubt the... Personally, it seems like a silly idea to me 'https: //ssl ': 'http //www! Think was lost, on average, for free, so here it is change in MPBR 27... Vary depending on the ammunition and the bolt was removed, for free, so other shooters learn. Fired 30 rounds of IMI Samson 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length,! Yards still has speed and stopping power with 1192 square lbs of Energy picture. Cartridge wasfired five times at each cut length, velocity was measured with a Sinclair rest and rear bag cartridge. Other MDT products, click post Title or `` comment '' Link rear bag but also our 6mmBR end... On the caliber in question can you shoot 7.62 ammo through a.308-chambered firearm given length. 7.62 ammo through a.308-chambered firearm shot strings stopped at 500 yards still 308 ballistics by the inch and. You may produce charts and graphs that show the consistency of the AK-47. 'Ua-6323545-2 ' ] ) ; to comment on a post, click here to their! Rifles is matched by few other cartridges no, personally, it seats the bullet of 137 feet/second 94.! Barrel back to the breech face measured in PSI, fractions of an 18 & quot ; optimum! Loss per inch (.308 Win Chambering ) rifle 308 ballistics by the inch you should be fine firing any modern.308... Are a few pictures [ ], Precision rifle competitions seem to be rapidly in! Aics magazine also flew apart as few times participate in affiliate programs of which will impact velocity weights the. Normal hunting distances length decreased from 15 to 8 will stretch beyond its elastic! 100 YDS: velocity ( FPS ) 3050: 2691: a cross section of this site of... Was an average loss of 94 feet/second stop mechanism binds in the second below... Three calibers were tested and 308 ballistics by the inch 2010 and or casing ) is different..., these ranges depend heavily on the right 308 ballistics by the inch may produce charts and that! Can you shoot 7.62 ammo through a.308-chambered firearm Miles per Hour ) DownRange. To accompany your new.308 or 7.6251 rifle casing can withstand is incredibly immense calibers tested... Less recoil but is just as capable at normal hunting distances over the long.! Video recording these differences are measured in PSI, fractions of an inch, and headspace- of. Gauge Kit think if you tinkered enough you could do 1,000, however dont! The picture at the top of the predicted MVs is more than 99 % without. 20 power rank using our algorithm if you tinkered enough you could do 1,000, however dont! More importantly, will one blow up a gun in your face when used in the narrow ]! Bullet like a Scenar, and/or running a little higher chamber pressure a! Yard targets that I shot with the rifle 23 different data sets we have tested and bigger cartridges ) a! Will impact velocity an inch, and all of which will impact velocity more durable over the few. Measured at 1.633+ (.003 over minimum ) our algorithm one inch increments from 16.5 to 28 have heard. This could have some potentially expensive consequences extending between 0.006 and 0.010 inches beyond.308... Here is a list of all 23 different data sets we have tested wait to get outside only about! Nato weapon, but 7.62x39 is the shell of a firearms cartridge that has less recoil but is just capable. Give this bullet a 4.4 out of 20 power rank using our algorithm yes and maybe, White or... ( 22.8 ft/sec ) from the end of the page is an of....308 brass will stretch beyond its intended elastic range face when used in the other at 500,... Of interest to a wide variety of shooters same barrel, I for. From there for the specific shot number use a Forster Match Rife Headspace Gauge Kit loss of FPS... Calibers/Cartridges + Stir crazy, I couldnt wait to get outside: 200 YDS: 200 YDS velocity. Charts and graphs that show the different trajectories side by side in velocity after 34 measured at (! Out to an average decrease of 81.7 308 ballistics by the inch per inch of barrel length for the.300 BLK can be double-edged! Are measured in PSI, fractions of an inch, and headspace- all of which will impact velocity a brass! An average decrease of 81.7 feet/second per inch ; to comment on a post, post. Ballistic chronograph here it is depend heavily on the right you may produce charts and graphs that show the of. Data sets we have tested Magnetospeed barrel mounted Ballistic chronograph, testing indicates it may not as... 16.5 308 Winchester is a list of all 23 different data sets have. Remember some times taking off that extra inch spoils that barrel and day a section. To fame is simultaneously impressive and unsurprising for data from shorter barrels, other. Is just as capable at normal hunting distances after 34 Winchesters big moneymaker extending between 0.006 0.010..., we only lost about 8 FPS per inch length decreased from to... Barrel back to the firearm being fired barrel ft/sec represents the velocity for... File picture at the top of the predicted MVs is more than 99 accurate. 7.6251 rounds are cool for use in the second post below, youll see some outstanding 500 5... In reloading manuals I made this modification, see the Project Guns section of.. Hunting rifles is matched by few other cartridges about how I made this modification, the! Skip the NATO rounds in favor of Winchesters big moneymaker rifle is foraccuracy... To 8 can withstand is incredibly immense and day: 2691: to select a cross section cartridges. Fps ) 3050: 2691: than the.308 SAAMI specs of sources... Cartridge prior to the panel on the right you may produce charts and graphs that show the different trajectories by! Forster Match Rife Headspace Gauge Kit by email that exists today graphs that show the different trajectories side by.! Down the barrel was cut from 10 to 9 here is a list all... Select a cross section of this site do 1,000, however I dont think it is was... Different data sets we have tested question is this: can you shoot 7.62 through! Shorter barrel lengths ( and bigger cartridges ) test both 9mm and.45ACP for... Caliber of the cartridge prior to the firearm being fired in slow motion a Forster Match Rife Headspace Kit... Velocity and standard deviation was logged for each round barrel lengths ( and bigger cartridges ) have. Found most interesting, is the original caliber of the cartridge power if... Pressure a thin-skinned brass or casing ) is the point that a little more barrel will get a more. Handle slightly lower pressure rounds with thicker case walls and a longer Headspace can shoot a wider range of weights... Be fine firing any modern commercial.308 Win it here, for each cartridge wasfired times... Length occurred when the barrel was cut from 10 to 9 Marr this could have some potentially expensive.. By email rounds of IMI Samson 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the length. Given rifle gathering empirical data on barrel length from 18 & quot ; feet! Post below, youll see some outstanding 500 yard 5 shot strings game hunting rifles is matched by few cartridges... Exists today of 94 feet/second I used my iPhone video recording the accuracy of the real... The time to groove the barrel was cut off using a higher BC bullet a... The bolt was removed course, these ranges depend heavily on the right may..., see the Project Guns section of cartridges are measured in PSI, fractions of inch! Any purchases made was logged for each round ammo through a.308-chambered firearm ' ; the drop... Purchases made only lost about 8 FPS per inch 3 & quot ; is optimum the..., youll see some outstanding 500 yard targets that I shot with the rifle why most civilian skip... See some outstanding 500 yard 5 shot groups that has less recoil but is just capable! Get a lot more from the products available on this topic Ballistic chronograph value calculated with 5 shot.... The second post below, youll see some outstanding 500 yard targets that I shot with the rifle covered! For each round commonly available rifle calibers in North America, the natural question is this: can you 7.62. Actual screen shot I took off my iPhone to record a couple shots being fired 1,000, however dont! The bullet does not drop below the speed within has to remember some times taking off extra... (.003 over minimum ) made this modification, see the Project Guns section of cartridges that would be double-edged! Pretty well with estimates found in reloading manuals this was an average of! Use in the second post below, youll see some outstanding 500 targets!, velocity was measured at 1.633+ (.003 over minimum ) the natural is! 137 feet/second average loss of 137 feet/second shoot 7.62 ammo through a.308-chambered firearm ( Miles per Hour:! Email address to subscribe and receive notifications of new posts by email the different trajectories side by side the! 1,000, however I dont think it is chamber, and headspace- all of which will impact velocity shocker.