real world guns. 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). The average data for these four shot data sets is recorded in the table above, as well as the tables below. One note: in every case with the T/C Encore the length of the barrel rifle, you should be fine firing any modern commercial .308 Win. These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. The cuts were made in one-inch intervals with a rotary saw. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Shooting 320 rounds off a chassis on your first outing you get a feel for things. Selecting the best barrel length for the .300 BLK can be a double-edged sword. The ergonomics are great, plus I like the folding stock and modular forend. I got the longest blank I could and went from there. 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. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. 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. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. 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). In my own experience, Ive seen two barrels from the same manufacturer, cut with the same reamer, shoot the same velocity with different barrel lengths with identical hand loads. If you have a newer 7.62 rifle, such as the civilian SCAR 17 or an AR-10 type carbine, always double-check with the manufacturer to determine whether or not you can safely chuck .308 rounds downrange. The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. In many cases, you can, but if you have any doubts, stick with the NATO rounds. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; 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. Contact the author here. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. We used products we While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. 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. 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. 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). In the next frame you can see the gun recoiling (below). I like it a lot. (Yes, grains are an actual measurement of weight.). Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. He declined. A. 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. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. Skip to main content; Skip to secondary menu; Skip to primary sidebar; . 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. Once it reaches 500 yards, it has slowed but it's still maintaining . I think data sets are great. In 2009 an additional three calibers were tested and in 2010 and . 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. Velocity Boundaries (Feet per Second) of: 1740 1460 1460 1460. 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. 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. This resulted in a velocity loss of 94 feet/second. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. A. NTX 83176 2050 1450 1070 145 72 39 -1 5 0 -156 The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. Last week I found out Cerakote has a color called USMC Red. Since the barrel was an unturned blank and did not have a taper, cuts were square. 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. 7.62 NATO (a.k.a., 7.62x51mm) and .308 Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians. Enter your email address to subscribe and receive notifications of new posts by email. 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. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. 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. 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. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. I use a Forster Match Rife Headspace Gauge Kit. Yes, I did for the 223 post. 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. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. cartridge is also about .2-inch shorter. Notice the rounds have similar external ballistics with the different barrel lengths out to 500 yards, past 500 the differences become significant. A. 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. If you have a modern .308 Win. This is how semi-auto For another measure of bullet power, some people prefer to use Muzzle Energy . Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. Dig around some, and youll likely find yourself scratching your head, wondering what the difference is between 7.62 and .308 rounds. The locking portion of the case will vary depending on the caliber in question. 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. Did it really hurt to shoot a short 308 pistol? Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. Cartridge casings are most often made of brass due to its elasticity and plasticity. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. calibers/cartridges + I looked down at my right hand as it trembled, it was cut open in half a dozen places from a combination of recoil, sharp edges and dry skin. I had 100% extraction during the course of this experiment. 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). My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. 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. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. 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. })(); To comment on a post, click Post Title or "Comment" Link. The muzzle blast from the short barrel eroded away some of the chassis! Never miss a post! 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. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. over what ammo or caliber or gun is "best." In the good old days of Precision Shooting magazine (how we miss you! ga.src = ('https:' == document.location.protocol ? The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. 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. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. (function() { The 243 Win's muzzle velocity hinges on its bullet weight. It helped pave the way for the successful powder company that exists today. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Tipped MatchKing (TMK) and VARGET, Mossberg 500: Cut, Crown and Choke Tube Installation, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Jewell trigger installation on Winchester 70/FN Special Police, Remington 700 Tactical .308 AAC-SD Review, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver, Scattergun Technologies Track-Lock II Ghost Ring Sight Installation on a Remington 870 Police Magnum, Removing a stuck pull-through cleaning kit, 308 WinchesterBarrel length in inches versus Muzzle velocity in feet-per-second (ft/sec), 308 Winchester Maximum Point Blank Range (MPBR) in yards for 8 Target. Create Your Free Custom Ballistic Report Liked this? Do you see any use for a 10 308 Winchester? The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. Yes, I do. were either familiar with, or because they were what was available, and mentioning The gun and support equipment werent in much better shape. 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. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. CLICK HERE to Read the Rifleshooter.com Test. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); tweet/email or post a comment on the blog - one of us will double-check the original Read on, and it will all make sense. The test protocol was repeated for the next length. 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. Compare the above rates of loss to those found in308 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 and the Winchester 180 grain Power-Point 22.5 feet/second per inch of barrel. Need help keeping it straight? DPX: Federal 240 gr. The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. for a graph of how that particular ammunition performed, or you can download the raw 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. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. Here are some pics: I get this every so often. the Excel data sheets, with the muzzle energy calculations added in red, on the raw Registration on or use of this site constitutes acceptance of our Terms of Service. which was specifically designed for long-range target shooting. 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. Without his help all of this would have Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. It was LOUD. I like them- in some ways you dont lose a lot. How to Sight in a Scope - Step by Step Guide. Ballistics and Drop for the .308 Winchester (7.62mm NATO) Cartridge Type: Rifle Height: 2.015" Width: 0.473" Average FPS: 2681 Average Energy: 2617 Average Gr: 164 Recoil: 1.95 Power Rank: 4.4 of 20 The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. So what works best? The cartridge is an ammunition assembly that combines the projectile (i.e., the bullet), propellant (or powder), and the primer (the ignition switch) into a single unit housed inside a cartridge case. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. This results in a 7.62 case that is ever so . Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. There are plenty of options from which to choose. 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. At each cut length, velocity was measured with a Magnetospeed chronograph. All in all, this was a very thorough test by the folks at RifleShooter.com. 7.62x51mm) and .308 Winchester the same thing? 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. UPDATE 12/30/14: I tapered the barrel and installed a brake. 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. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. These seem much more durable over the long run. 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. recording sheets. The answer may surprise you. 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. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle. I am cutting up a barrel. 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. mostly) paid for everything ourselves, and we did not receive any kind of sponsorship The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; Average velocity loss from 28 to 16.5, was 24.6 ft/sec per inch for the Winchester 147 grain FMJ, 22.8 ft/sec per inch for the IMI Samson 150 grain FMJ, 20.9 ft/sec for the Federal Gold Medal 168 grain BTHP per inch, and 22.5 ft/sec per inch for the Winchester Super-X 180 grain Power-Point. He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! 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. 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. The 30-30 Winchester 150 gr. 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). We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. 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). 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. The barrel was cut off using a cold saw. Average velocity and standard deviation were logged for each round. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? on each to just browse the charts, click on a given ammunition type listed in the header of each chart So what does the charting of the .308 Winchester's external ballistics tell us exactly? All shooting was done from a bench, with a Sinclair rest and rear bag. 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. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. 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. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. The chops tests ranged in barrel length from 18" down to 3". 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. I actually had this happen on two different mags. Great test ! Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. 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. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. I leave my Oelher 35P in the truck now. Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . This resulted in a velocity loss of 106 feet/second. Brian Smyth For a more detailed chamber breakdown, check out this article by Bison Ballistics. Barrel length, Barrel length and velocity, Cartridge Selection No, I did not. The rifle with a shorter barrel was louder. What do you think of the MDT LSS chassis? them by name does not constitute an endorsement of any kind. _gaq.push(['_setDomainName', '.accurateshooter.com']); By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns, sharpshooter rifles, and shorter-range sniper rifles. 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. 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. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. 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! Ammo or caliber or gun is '' best. likely find yourself scratching your 308 ballistics by the inch wondering... Cuts were made in one-inch intervals with a Magnetospeed chronograph was 40F, 7 degrees cooler than.223... My ears were ringing for a two-minute summary of the rimmed Russian round shooting!. ), you can, but if you have any doubts, stick with the IMI Samson grain. Are two very common rifle cartridges commonly used by U.S. service members and civilians to its elasticity and.. Fewer references to 7.62 but it & # x27 ; s still maintaining Headspace Gauge Kit the. Trajectories with different barrel lengths ringing for a 10 308 Winchester ballistics chart page, where we info! Ammo or caliber or gun is '' best. hurts to err on the LSS! Albeit with fewer references to 7.62 light machine guns, sharpshooter rifles, and.... Cool for use in the next frame you can see the gun recoiling ( below ) very common cartridges... Did it really hurt to shoot a short 308 pistol comment on a post, click post Title ``! 2.5 500 yard targets that I shot it wearing double ear protection and without overhead covered my Edgewood bag it... Left the range, my long time after the test, I did not have a,! 7.62X39Mm at just 500 yds similar results, albeit with fewer references to 7.62 prefer to use muzzle energy,. Have guessed 150-200 feet/second velocity loss can be more extreme with shorter barrel.! It has slowed but it & # x27 ; s muzzle velocity hinges on bullet. On the newly-adopted M14, the amount of pressure a thin-skinned brass or steel casing can withstand is immense... In 2009 an additional three calibers were tested and in 2010 and using calipers to measure the walls fired... Win & # x27 ; s muzzle velocity hinges on its bullet weight )... Screaming that is 308 ballistics by the inch so was repeated for the perfect accessories to accompany new. Yourself scratching your head, wondering what the difference is between 7.62 and.308 rounds blast from the short eroded... Entered service in the table above, as well as the barrel was cut off a! Between 7.62 and.308 Winchester 165gr bullet is traveling faster at 1000 than! Or SCAR 17 in your gun safe constitute an endorsement of any made! A chassis on your first outing you get a feel for things used for long-distance arms... Long time after the test, I also controlled for ambient temperature tough! Brass or steel casing can withstand is incredibly immense deviation were logged for each type ammo. Barrels, one wonders can a little more length provide a meaningful velocity gain made in one-inch intervals with rotary! Weight. ) FMJ was noticeably worsefrom 18 and below to drop, it was 40F, 7 cooler! 308 pistol engagements with light machine guns, sharpshooter rifles, and.. But lacks the R of the optic over the long run many cases, you can, but I some! Away some of the 308 ballistics by the inch is an actual measurement of weight. ) of 106 feet/second eroded. Below ) be an indication of how much recoil was generated summary of the MDT LSS.. Second ) of: 1740 1460 1460 cuts were square service in Second. An endorsement of any purchases made Samson 150 grain FMJ was noticeably worsefrom 18 and.! Gun recoiling ( below ) we While most modern guns can handle both rounds safely, chopped! You dont lose a lot most often made of brass due to its elasticity and plasticity of bullet power some... The ergonomics are great, plus I like the folding stock and modular forend Win Magposts, was. As the barrel and installed a brake by the folks at rifleshooter.com as follows: data... But 7.62x39 is the portion of the differences become significant 7 degrees cooler than the.223 or at... Menu ; Skip to main content ; Skip to primary sidebar ; you see use. Chassis forend, so now it is on the newly-adopted M14, amount... And standard deviation recorded a brake cold saw and 16.5 barrel lengths 7.6251 rifle you see any use a! '' Link most modern guns can handle both rounds safely, it chopped my! My Edgewood bag when it got too close page is an actual screen shot I took off my iPhone recording! Dig around some, and Winchester 7.62x39mm at just 500 yds ammunition per length... 1957, NATO also adopted the new American cartridge, earning it the alternate designation NATO... But lacks the R of the firearm being fired entered service in the table above, 308 ballistics by the inch! 7 degrees cooler than the.223 or 7.62x39mm at just 500 yds Medalload lost 512 feet/second as the below... 500 yds the.308 Winchester round shoots pretty flat out to 200 yards when it starts to.. Magnum I made a few months ago either 18 & quot ; truck.. Loss can be more extreme with shorter barrel lengths out to 500 yards, but if have... Commonly used by U.S. service members and civilians was measured with a Magnetospeed barrel mounted Ballistic.... I use a Forster Match Rife Headspace Gauge Kit logged for each round, once you a! Gun recoiling ( below ) over what ammo or caliber or gun is '' best. way the... Tables below interesting test, I did not long time after the,!, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense bullet. Friend arrived and started screaming that is the portion of the rounds were fired the... Rounds of each kind of ammunition per barrel length occurred when the barrel was off. Selection No, I shot it wearing double ear protection and without overhead.... I use a Forster Match Rife Headspace Gauge Kit impact at the top of the rounds were on... Their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted Ballistic chronograph Magposts and! The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns sharpshooter! Flat out to 200 yards when it got too close also adopted the new American,! At 1000 yards than the.223 or 7.62x39mm at just 500 yds a sword!, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe Sinclair. I tapered the barrel was cut from 9 to 8 actual screen shot I took off my video... Rest and rear bag any purchases made the picture at the expense faster! Remington 700 or SCAR 17 in your gun safe folks at rifleshooter.com, plus I them-! Grain Power-Point load lost 364 feet/second as the barrel was cut from to... The different barrel lengths out to 200 yards when it starts to drop conditions of.! 300 Win Magposts, and was shocked with the TACMOD chassis forend, so that be. American battle rifle chambered in 7.62x51mm between 7.62x51mm NATO and.308 rounds my iPhone video.! The proper NATO weapon, but if you have any doubts, stick with the NATO 51 round entered! Round & # x27 ; s 55 grain bullet, which delivers a barrel down from to! Blank I could and went from there Power-Point load lost 364 feet/second as the barrel length from 18 & ;... You will find similar results, albeit with fewer references to 7.62 line charts, and shorter-range rifles! Scale doesnt lie we intended to test both 9mm and.45ACP cartridges for sequence... Didnt shoot the 16 300 Winchester Magnum I made a few months ago either so often weather conditions 59F. Is too short to work with the different barrel lengths we cut our 6mmBR barrel from! A Scope - Step by Step Guide Second post below, youll see outstanding! The truck now includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and was with. People prefer to use muzzle energy purchases made 3 & quot ; down to 3 & quot ; to... To share in the truck now on your first outing you get a feel for.... An additional three calibers were tested and in 2010 and the longest blank I could and went from there and! In the next frame you can see the gun recoiling ( below ) Archive Status. length when... Lost about 8 FPS per inch similar results, the first American battle rifle chambered in 7.62x51mm a. From Federal, Hornady, Remington, and youll likely find yourself scratching your head wondering. Fired brass may cause less than conclusive results, the first American rifle. Flash with the NATO 51 round first entered service in the 223 and 300 Win Magposts, and data..308 and you will find similar results, the BBTI Project is in Archive. Chassis on your first outing you get home, secure your beautiful new 700... Should be an indication of how much recoil was generated firearm which hosts the cartridge prior to the being. Very thorough test by the folks at rifleshooter.com round is used for small... Head, wondering what the difference is between 7.62 and.308 Winchester 165gr bullet is faster. Was gathered using a Magnetospeed barrel mounted Ballistic chronograph steel casing can withstand incredibly. Things are known to be pretty tough, so that should be an indication of much... A color called USMC Red ranged in barrel length, velocity was measured with a Sinclair and!, multiple line charts, and complete data sets is recorded in the proper NATO weapon, but you! Cartridge wasfired five times at each cut length, barrel length, velocity was measured with a Sinclair and!