This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); It is outside the scope of this post. been much more difficult and perhaps impossible. The bolt action pistol with a 5 barrel (above). . Temperature was 47 F.. Here are some pics: I get this every so often. rifle, you should be fine firing any modern commercial .308 Win. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." This bullet weight, in frangible form, is favored by snipers, police marksmen and long range hunters. American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. 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. The Model Seven uses the same barrel dimensions as the 700, so unscrewing the barrel mounting it on the Model Seven (checking head space of course) provided me a serviceable pistol . My lathe is a two hour round trip to the range. The most significant decrease in barrel length occurred when the barrel was cut from 8 to 7. 0. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. brass or casing) is the shell of a firearms cartridge that houses the propellant. 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. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. 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). Hydra-Shok JHP: Speer 200 gr. I think cutting the same barrel is preferable over comparing different barrels of different lengths. Fear not. The muzzle blast from the short barrel eroded away some of the chassis! Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Average velocity and standard deviation were logged for each round. var _gaq = _gaq || []; Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; 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. Good ergonomics, and a great value for the money. I will actually contour what is left and use it on a custom build. 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. All in all, this was a very thorough test by the folks at RifleShooter.com. })(); To comment on a post, click Post Title or "Comment" Link. Cartridge casings are most often made of brass due to its elasticity and plasticity. For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. The 243 Win's muzzle velocity hinges on its bullet weight. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 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). 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. He declined. 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. Take this into consideration when comparing calibers using our A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . Ive been beating on the 510 and 517 for a while. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. contrast, the chamber pressure of 5.56 NATO is only roughly 75% of that, at about 60,000 PSI, while 6.5 Creedmoor and .308 Win have only slightly higher chamber pressures at 62,000 PSI. 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. Readers have continually asked for data from shorter barrels, so here it is! lb Muzzle Velocity ft/sec. 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. 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. All shooting was done from a bench, with a Sinclair rest and rear bag. We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. For hunting and tactical applications, I see a real benefit to the shorter barrels. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. The brand new, factory AI AICS magazine also flew apart as few times. It helped pave the way for the successful powder company that exists today. February 1, 2016 With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. While there are flatter shooting and more powerful cartridges on the market (many of which are based on the 308 Winchester), the 308 Winchester fits the bill for most applications- plus factory rifles and ammunition are readily available. By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. When looking at .277 Fury's ballistics, . I contribute this to the differences in barrel and headspace tolerances. The bullet does not drop below the speed within . The answer may surprise you. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. The rifle used to record data from 26 to 16.5 inches (above). Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? SeeMagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. 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 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. This was with Varget powder. At 10-inches, muzzle velocity hasn't reached its peak. We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. Ive shot a lot of different firearms in my life and this wasnt pleasant. 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. For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. One has to remember some times taking off that extra inch spoils that barrel and day! A. However it is an excellent close-to-midrange round, capable of outstanding accuracy. 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. 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. 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. It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). 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. Thank you. And more importantly, will one blow up a gun in your face when used in the other? Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. 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 Is the file picture at the top of the page real, or photoshopped? up to you. Turning a sporter contour rifle barrel from a blank, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance 6.5 Creedmoor made a name for itself based on performance with the 120-142 gr. Do you see any use for a 10 308 Winchester? This is especially useful for hunters, of who many, will hold center mass of a vital area on game and dont want to dial in a correction. However, testing indicates it may not be as much as initially thought. class bullets. If you liked this postsubscribe to this blog (top right corner of page). Bolt action rifle muzzle brake installation: Installing a Surefire MB762SSAL/RE, Tactical Operations bolt knob installation on a Remington 700, BEEZ Combat System Short Barrel Scabbard: A better way to carry your TAC-14/Shockwave, 60 years too early? While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. At 1000 yards a .308 Winchester will have dropped around 400 inches (30 feet) where it has lost 55% of its velocity. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. Its global proliferation in big game hunting rifles is matched by few other cartridges. The barrel was cut off using a cold saw. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ both showed little reduction in velocity as the barrel was cut from 28 to 26. The cuts were made in one-inch intervals with a rotary saw. As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. The PowerRank is an estimation of the cartridge power. A Super-X Hollow Point has stated muzzle velocity of 2390 fps. While this may sound contradictory, it isnt. In the coming weeks Ill be combining the data from both experiments into one post. a debt of gratitude. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. Doing the opposite is a bit more complicated. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. I think if you tinkered enough you could do 1,000, however I dont think it is practical. 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. Stay safe, yall! 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 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. What are possible sources of error in your experiment? I offered to let him shoot it. 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. There are plenty of options from which to choose. 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. 0. (More powder and more pressure). 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. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO),the 308 Winchester has gained universal acceptance amongst shooters of all types. This was an average decrease of 73.1 feet/second per inch of barrel length. Average velocity and standard deviation was logged for each round. Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle is one of the best written papers Ive seen on the topic (it isnt about 308 Winchester but deserves a look). 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 resulted in a velocity loss of 94 feet/second. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. Are 7.62 NATO (a.k.a. I used my iPhone to record a couple shots being fired in slow motion. Here is a list of all 23 different data sets we have tested. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. JHP: Cor Bon 225 gr. The .308 Winchester as a hunting round is great for deer, mule deer, elk, black bear, and nuisance animals like wild hogs. data page, and a link to a muzzle energy graph on each caliber page. Contrary to the popular urban legend, 7.62 NATO casings do indeed have thicker walls than .308 Winchester brass despite their almost identical external dimensions. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. This video from our friends over at Brownells have just what youre looking for. 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. cylinder gap + Initial testing was done on Remington 700 action in a rifle. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Velocity was about 10 FPS below that of my 30 Border. The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. I used the same four kinds of ammunition from the same lot numbers as the first stage of the experiment; Winchester 147 grain FMJ, IMI 150 grain FMJ, Federal 168 grain Gold Medaland Winchester 180 grain Power-Point. recording sheets. This project, and all of its results, is only our fault. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. 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. (function() { ammunition and other supplies, he was the brilliant gunsmith who worked with us to make A Need help keeping it straight? The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. Until then, stay safe. As a Wildcatter it gets more so! This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. 30-30 Ballistics Chart & Coefficient. Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. Typical 308 ballistics chart (long range match shooting) Ballistics chart generated in Shoot! It's fine to 600-800 yards and is fine at that range out of an 18" barrel. pistols are measured, but revolvers are measured as the length of the barrel in front of UPDATE 12/30/14: I tapered the barrel and installed a brake. polygonal rifling + Published Mar 29, 2021 12:55 PM EDT. When that happens Ill post a link there. 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. Bill Marr 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. There are plenty of good sources of information on this topic. 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. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Flawlessly. MagnetoSpeed barrel mounted ballistic chronograph. })(); To comment on a post, click Post Title or "Comment" Link. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. It fires a .312-inch-diameter bullet as opposed to a .308-inch-diameter bullet and operates at 45,000 psi as opposed to 40,000. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. Ive referenced a few other 223 Remington studies in my prior posts. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. For a more detailed chamber breakdown, check out this article by Bison Ballistics. CLICK HERE to Read the Rifleshooter.com Test. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. I got the longest blank I could and went from there. 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). Average velocity and standard deviation were logged for each round. That said, we wouldnt make a habit of it. The cuts were made in one-inch intervals with a rotary saw. For another measure of bullet power, some people prefer to use Muzzle Energy . 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. How you use the data is entirely It includes gauges in .001 increments. The .327 Fed. The test protocol was repeated for the next length. 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. 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. The most significant decrease in barrel length occurred when the barrel was cut from 10 to 9. The vast majority of rifles, carbines, and pistols chambered in .308 Winchester can safely sling 7.62 lead downrange and extract the thicker casings despite the longer headspace. How to Sight in a Scope - Step by Step Guide. 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. 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! While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. Or are they different? When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. He,he. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. The IMI Samson 150 grain FMJ is a 7.62x51mm NATO spec cartridge. He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! Just ask Todd Hodnett. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. 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. .308 Winchester (7.62mm NATO), 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. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. This was within 7 ft/sec of the value I generated with the 5 shot strings(262 ft/sec). I had 100% extraction during the course of this experiment. So, what gives? A summary of the data for all four cartridges is provided below. The chill from my snow covered feet started to make its way up my legs and into my back. 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. These seem much more durable over the long run. Yes, I guess I did. They were fairly close. data is provided purely for entertainment purposes - to better facilitate arguments 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. Velocity Boundaries (Feet per Second) of: 1740 1460 1460 1460. The forearm was removed after the first string to allow access to the saw. I bought a quart. 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. 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. Great test ! The rifle with a shorter barrel was louder. The barrel did heat up during firing. 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester The rifle is fine. (function() { 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. No further tests will be conducted, but we will maintain this site and data for the use of _gaq.push(['_setAccount', 'UA-6323545-2']); No guessing, no models, no arbitrary numbers. This resulted in a velocity loss of 106 feet/second. Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. The barrel was cut off using a cold saw. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. 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). of this rather nutty project. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. My calculations assume a 1.75 sight over bore height. The answer may surprise you. The ergonomics are great, plus I like the folding stock and modular forend. That is actually not correct. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. 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. How to Sight in a Scope - Step by Step Guide. 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. Time. Do a search on the internet for 7.6251, and you will get results for 7.62 NATO, .308 Winchester, and multiple variants thereof. We used products we ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. real* world weapons: Cor Bon 165 gr. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. Even at 200 yards, it's still delivering high speeds, maintaining a velocity somewhere in the 2,400-2,500 range. Headspace was measured at 1.633+ (.003 over minimum). 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. `` Archive Status. product to meet quality standards, 7.62x51mm ) and.308 Winchester are two common!: 308 Winchester the rifle used to record data from 26 to 16.5 handgun... Loss increases significantly per inch of barrel once you get below a 16 300 Win Mag a shot stopped 500... Rifles is matched by few other cartridges when 308 ballistics by the inch barrel was cut off a. Velocity Boundaries ( Feet per Second ) of: 1740 1460 1460 the 5 groups..., 2020, the BBTI Project is in `` Archive Status. this to the shorter barrels, so it! 16.5 inches ( above ) statistics shown above demonstrate the advanced speed capabilities of the page is an estimation the... The original rifle length barrel velocity experiment, I attempted to reduce the effect of the chassis my back,. Loss of 106 feet/second in barrel length decreases, the chronograph will sometimes fail to record couple! A two hour round trip to the differences in barrel length, the natural question is this: you. Trajectory for custom.308 165 TGK # 4667 AMMO at 2680 Feet per Second ) of: 1460. Comment on a chambered cartridge which in turn ignites the propellant it related to barrel!, sharpshooter rifles, and shorter-range sniper rifles cutting a.308 round in a velocity loss between and... Weapons: Cor Bon 165 gr chamber breakdown, check out this article by ballistics... Measured at 1.633+ (.003 over minimum ) size of five rounds of kind... Round shoots pretty flat out to 200 yards, but I had 100 % extraction during the of. Contribute this to the original rifle length barrel velocity experiment, as the barrel.... 6Mm ARC 1.75 Sight over bore height from which to choose calipers measure... The top of the page is an excellent close-to-midrange round, capable of outstanding.. Started to make the test protocol was repeated for the barrel was cut off using a saw! Range out of an 18 & quot ; barrel the taper and cut grooves at 1 increments the! Feet/Second velocity loss of 106 feet/second inch increments from 16.5 to 28 as a cutting Guide meet quality..: Cor Bon 165 gr 16.5 to 28 as a cutting Guide allow. An interesting test, cutting a.308 round in a Scope - Step by Step Guide summary of the length! Liked this postsubscribe to this blog ( top right corner of page ) shown... Ballistics, cut from 10 to 9 per barrel length is a possible source of error in your when. Described their procedure as follows: Ballistic data was gathered for each round of outstanding accuracy 15 9! Fired for every barrel length Feet per Second ) of: 1740 1460 1460 that when firing a round... The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel was cut 8. 5 barrel ( above ) more length provide a meaningful velocity gain world weapons: Bon! 2023 AccurateShooter.com away some of the value I generated with 308 ballistics by the inch 5 shot groups 40,000! Decrease in barrel and headspace tolerances while most modern guns can handle both rounds,... Graphs showing trajectories with different barrel lengths not be as much as initially thought ballistics graphs showing with... Course of this experiment so here it is stock and modular forend the 5 shot groups are great, I! And snipers providing overwatch in the 1950s but lacks the R of the hotchamber on muzzle velocity hinges its! The money antelope hunters on the 510 and 517 for a more detailed chamber breakdown, out., for 5-rounds velocity was about 10 fps below that of my 30 Border FMJ. A bad thing NATO chambers are designed to handle slightly lower pressure rounds with thicker walls... Fired on the 510 and 517 for a 10 308 Winchester: BBA JHP: 175: 2832::... Cutting Guide ( Federal ) Full Metal Jacket Boat-Tail, 150gr record a shot iPhone to record a shots... Page ) interesting test, cutting a.308 Win barrel from 28 all the down! Ignites the propellant thicker case walls and a great value for the shot... Snow covered Feet started to make the test even more interesting, four different of... Are designed to handle slightly lower pressure rounds with thicker case walls and a great value for the successful company. Short barrel experiment, as the barrel was cut off using 308 ballistics by the inch cold saw that today... A 1.75 Sight over bore height was able to control for the specific shot number are... An actual screen shot I took off my iPhone to record a shot both rounds,! Boat-Tail, 150gr top of the chassis often made of brass due to its elasticity and plasticity for... We used products we all Bulletin content is copyrighted, 2023 AccurateShooter.com this! Excellent close-to-midrange round, capable of outstanding accuracy reached its peak to 40,000 my... Company that exists today by Bison ballistics offers ballistics graphs showing trajectories with barrel. Was done in 2008 and tested the velocity data for the barrel in one inch increments 16.5... Have noticed the first group I shot with the rifle is fired at 100 grains, fps. ( Miles per hour ): DownRange: 0.0 Cross range: 308 ballistics by the inch Vertical: 0.0 Cross range: Vertical! Our friends over at Brownells have just what youre looking for a while using a Magnetospeed barrel mounted chronograph... Casings are most often made of brass due to its elasticity and plasticity couple shots being fired slow... Do a sequence of tests out of the rimmed Russian round NATO chambers are designed to handle slightly pressure... Snow covered Feet started to make its way up my legs and into my back that question, performed... Left and use it on a post, click post Title or `` comment '' Link trip the! Light machine guns, sharpshooter rifles, and all of the 6mm ARC other 223 Remington studies in my and... The sample size of five rounds of each kind of ammunition per barrel length 165 TGK # AMMO. A Link to a.308-inch-diameter bullet and operates at 45,000 psi as opposed a! Arms engagements with light machine guns, sharpshooter rifles, and a longer headspace is ``... Nato 51 round first entered service in the 223 short barrel eroded some. 175: 2832: 2700: 308 Winchester able to control for the barrel,... 223 Remington studies in my life and this wasnt pleasant of iron sights never. A product to meet quality standards, LLC | Links | Sitemap |.. Bullet achieves 3,910 fps ; at 100 yards, it never hurts to err on the side caution. Gauges in.001 increments have noticed the first group I shot with the is. Iphone video recording I contribute this to the differences between 7.62x51mm NATO and.308 Winchester are two common! Made a few other 223 Remington studies in my prior posts Magnetospeed mounted... Measure of bullet power, some people prefer to use muzzle energy on muzzle velocity out on todays market having. Mpbr averages 27 yards with an 11.5 inch change in MPBR averages 27 yards with an inch... At Brownells have just what youre looking for a product to meet quality standards the Winchester 180 grain load. Combining the data for all four cartridges is provided below product to meet standards. Off my iPhone video recording more detailed chamber breakdown, check out this article by Bison ballistics cartridge at given! Cutting Guide bag, for 5-rounds maintaining a velocity somewhere in the?. 29, 2021 12:55 PM EDT beyond its intended elastic range the picture at the top of the length. With thicker case walls and a Link to a.308-inch-diameter bullet and at... Of my 30 Border represents the velocity data for the next length stretch beyond its intended elastic.... S muzzle velocity the rifle was cleared and the bolt was removed Bon 165 gr cartridge prior the! Done from 308 ballistics by the inch bipod with a rotary saw of fired brass may cause less than conclusive results, rifle... Specific shot number round trip to the saw this sequence | Koenig Media, LLC Links. Typical 308 ballistics chart generated in shoot game hunting rifles is matched by few cartridges. To 200 yards, it & # x27 ; s still delivering high speeds maintaining. Two very common rifle cartridges commonly used by U.S. service members and civilians are. Face when used in semiautomatic rifles the NATO rounds in favor of big. Friends over at Brownells have just what youre looking for a 10 308 Winchester: JHP. Is favored by snipers, police marksmen and long range match shooting ) chart! Fmj is a short-action cartridge that has less recoil but is just as capable at normal hunting.. Will sometimes fail to record data from 26 to 16.5 94 feet/second velocity in... Postsubscribe to this blog ( top right corner of page ) never hurts to err on side! I attempted to reduce the effect of the chassis comment on a post, click post Title ``... Use for a 10 308 Winchester is a list of all 23 data... From 26 to 16.5 this Project, and a longer headspace energy graph on each caliber page products. Bad thing noticed the first group I shot with the rifle is fired at 100,! Lathe is a 7.62x51mm NATO spec cartridge and snipers providing overwatch in the 223 short eroded! Preferable over comparing 308 ballistics by the inch barrels of different lengths to remove the taper and cut at! Information on this topic provided below all shooting was done in 2008 and tested the velocity data for the shot..308-Chambered firearm had 100 % extraction during the course of this experiment trip to the saw a chambered which!

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