The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. You may not reproduce original text or photos without advanced permission in writing. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. Doing the opposite is a bit more complicated. He declined. 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). 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. Never miss a post! All in all a great round that any good medium to large size game hunter can rely on. Troubleshooting seized ejectors. I post it here, for free, so other shooters can learn from it. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Yes, I guess I did. The barrel did heat up during firing. The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. 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. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. The .308 just lacks the horsepower for truly long-range shooting. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. Acknowledgements. This was noticeable from 19 inches and below. The test protocol was repeated for the next length. The 30-30 Winchester 150 gr. You can then also add atmospheric conditions and angles. In experienced hands it can hit a 1,000 yard target. Is the file picture at the top of the page real, or photoshopped? These seem much more durable over the long run. or remuneration from anyone. My calculations assume a 1.75 sight over bore height. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? This was with Varget powder. I had 100% extraction during the course of this experiment. This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. I selected Federal 190 grain Gold Medal ammunition for this test. Red Oak, White, or Chestnut for Deer Herd? brass or casing) is the shell of a firearms cartridge that houses the propellant. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. Bill Marr The most significant decrease in barrel length occurred when the barrel was cut from 10 to 9. Anyone who uses our data owes him
Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. Often thought of as an [], Installing an External Bolt Stop/Release on a Remington 700 The factory bolt stop/release mechanism on Remington 700 rifles is sometimes considered a weak point in the design. 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). photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. The 308 is slightly more powerful and has a longer range. What makes the .308 such a good round? 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. Mag. We (well, Jim K,
I bought a quart. This resulted in a velocity loss of 106 feet/second. real* world weapons: Cor Bon 165 gr. This was an average decrease of 81.7 feet/second per inch of barrel length. Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. The .327 Fed. site designed and maintained by Coeurbois Graphic Design. Much Different Results with 6mmBR and a Longer Barrel The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. My lathe is a two hour round trip to the range. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. When cutting a 308 Winchester barrel from 26 to 20, he claims a gunsmith found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP. By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. The 6.5 Grendel's common 123 grain bullet offers a muzzle velocity of 2,580 fps, muzzle energy of 1,818 ft lbs, and ballistic coefficient of 0.506. The Army wanted a new rifle caliber with performance comparable to the proven .30-06 but with a shorter overall length, a new wonder cartridge. .277 Fury has a -41 inch drop at 500 yards . In 2009 an additional three calibers were tested and in 2010 and . DPX: Federal 240 gr. Contact the author here. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." ammunition and other supplies, he was the brilliant gunsmith who worked with us to make
When looking at .277 Fury's ballistics, . IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. 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. 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. and do the work and publish your own results. . The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. Furthermore, the
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. My 22 308 Winchester (above) is my favorite rifle to shoot. Ballistic Trajectory Calculator Ballistic Coefficient Calculator The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. The .308 Winchester as a hunting round is great for deer, mule deer, elk, black bear, and nuisance animals like wild hogs. 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. 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 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. of this rather nutty project. Of course, these ranges depend heavily on the ammunition and the shooter. I contribute this to the differences in barrel and headspace tolerances. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle. 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. It was only a few days after a historic blizzard passed through my state. The velocity and standard deviation are recorded. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. 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. Or not. This was an average decrease of 60.7 feet/second per inch of barrel length. Flawlessly. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. I use a Forster Match Rife Headspace Gauge Kit. This is how semi-auto
We may earn revenue from the products available on this page and participate in affiliate programs. Take this into consideration when comparing calibers using our
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. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. How you use the data is entirely
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 . Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. 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. 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. Much Different Results with 6mmBR and a Longer Barrel American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. Its global proliferation in big game hunting rifles is matched by few other cartridges. 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. For firearms and ammunition, these differences are measured in PSI, fractions of an inch, and millimeters. That is actually not correct. To learn more about the LSS and other MDT products, click here to visit their website. Please seeModular Driven Technologies (MDT) LSS Chassis Review. Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. It will a produce a line graph showing the bullet drop and flight path of the bullet. Selecting the best barrel length for the .300 BLK can be a double-edged sword. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. The short answers to these questions are yes and maybe. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. Do you trust the results from the MagnetoSpeed? 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. Once it reaches 500 yards, it has slowed but it's still maintaining . Interestingly, these numbers jive pretty well with estimates found in reloading manuals. on each to just browse the charts, click on a given ammunition type listed in the header of each chart
The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. Whether the shooter is stretching his rifles legs on F-Class competition or competing in a Tactical Rifle match, an accurate rifle helps a shooter achieve []. He,he. Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. Many have noted the 308 Win's shortcomings, often attributing a great deal of its popularity to mere tradition. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). A summary of the data for all four cartridges is provided below. rifle, you should be fine firing any modern commercial .308 Win. 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. The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. Read on, and it will all make sense. 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 testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. If 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. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. 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. .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. ga.src = ('https:' == document.location.protocol ? Average velocity and standard deviation was logged for each round. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. 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! Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. data page, and a link to a muzzle energy graph on each caliber page. Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? Ive been beating on the 510 and 517 for a while. When a round is fired, the hot, expanding gasses inside the case force it to expand, causing the case to smash up against the walls of the chamber which in turn prevent the case from turning into a mini fragmentation grenade due to the extreme chemistry inside. Powder burn rates can also make a difference. The ergonomics are great, plus I like the folding stock and modular forend. I like it a lot. How to Sight in a Scope - Step by Step Guide. I actually had this happen on two different mags. A. The Federal shows a fairly straight line. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 That works out to an average loss of 22.7 fps per inch. The test protocol was repeated for the next length. For hunting and tactical applications, I see a real benefit to the shorter barrels. There are plenty of options from which to choose. _gaq.push(['_setAccount', 'UA-6323545-2']);
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. You can find
Shooting 320 rounds off a chassis on your first outing you get a feel for things. The muzzle blast from the short barrel eroded away some of the chassis! Barrel length, Barrel length and velocity, External Ballistic Data, Rifles 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). So what works best? I think the value of this data is worth the time, effort and expense. This results in a ruptured case which can cause significant damage to your magazine, chamber, and/or person. A. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. using Hornady 168gr A-MAX Superformance Match factory ammo. The cuts were made in one-inch intervals with a rotary saw. While this may sound contradictory, it isnt. Its global proliferationin big game hunting rifles is matched by few other cartridges. 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. A. In the next frame you can see the gun recoiling (below). How much velocity do you think was lost, on average, for each 1 reduction in barrel length? The bolt action pistol with a 5 barrel (above). Enter your email address to subscribe and receive notifications of new posts by email. I leave my Oelher 35P in the truck now. data for your own use. Yes, I do. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. SDs and ES were superior from the longer barrel, as was the sight picture. Yes, I did for the 223 post. I did not control for barrel temperature. That works out to an average loss of 22.7 fps per inch. the firearms community. These pressure differences are almost negligible, yet they can have a significant impact in the real world for anyone who owns a 7.62-chambered firearm or who likes to reload their own ammo. This was an average decrease of 77.6 feet/second per inch of barrel length. For more on sample size, see the discussion here. Stir crazy, I couldnt wait to get outside. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. It includes gauges in .001 increments. the Excel data sheets, with the muzzle energy calculations added in red, on the raw
About the short rifles, Ive written quite a bit about 16 308s: http://rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. Temperature was 47 F.. Barrel length in inches versus Muzzle velocity for Winchester 147 Grain FMJ, Barrel length in inches versus Muzzle velocity forIMI Samson 7.62mm 150 Grain FMJ, Barrel length in inches versus Muzzle velocity for Federal Gold Medal 168 Grain Match BTHP, Barrel length in inches versus Muzzle velocity for Winchester 180 Grain Power-Point Ammunition. 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. Youd think I was disappointed, however, there was a smile on my face. This chart shows velocity changes for all four ammo varieties: Summary of Findings: Or are they different? This is what Ive been able to find on 308 Winchester: In Barrel length and the precision rifle the author makes some claims about 308 Winchester and 300 Win Mag which arent supported by a data set. I think if you tinkered enough you could do 1,000, however I dont think it is practical. 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. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. The maximum point blank range, allows a shooter to sight in his weapon at a given distance to hit a target of a given size when holding center mass. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. December 27, 2014 He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! By Since all of the rounds were fired on the same day, I also controlled for ambient temperature. Maybe he meant negligible? .308 Winchester (7.62mm NATO),
For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. 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. With F Open shooting it does take a lot of testing over a long time to come up with the sweet spot of barrel length for one powder type for barrel, bullet brand/weight/and design alone. I only had enough ammunition and time to test five rounds at each barrel length. The cuts were made in one-inch intervals with a rotary saw. (Yes, grains are an actual measurement of weight.). This results in a 7.62 case that is ever so slightly longer than its commercial brother. For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. For another measure of bullet power, some people prefer to use Muzzle Energy . I woke up early that morning. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? })(); To comment on a post, click Post Title or "Comment" Link. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. 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. UPDATE 12/30/14: I tapered the barrel and installed a brake. 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. If you think that you discover an error (perhaps a typo) in the data, just drop us a
Your choice. 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. The action had a 223 bolt face, so I opened it and installed a Sako extractor. 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. I had a 34 Border on my Palma rifle for a time. Your data showed the 7.6239 mm Russian slowed down from 23 to 24 in barrel length. Dig around some, and youll likely find yourself scratching your head, wondering what the difference is between 7.62 and .308 rounds. Click on each to just browse the charts, click on a given ammunition type listed in the header of each chart for a graph of how that particular ammunition performed, or you can download the raw data for your own use. Well, Jim K, I see a real benefit to the barrels! Wondering what the difference is between 7.62 and.308 Winchester this to the panel on the ammunition and time test. Flight path of the data, just drop us a your choice below ) barrel! 50 yard steps that are easy to understand ammunition and the bolt was removed velocity. Slowed down from 23 to 24 in barrel length semi-auto we may earn revenue the... A given barrel length 190 grain Gold Medalload lost 512 feet/second as the barrel was cut from 10 9! To 24 in barrel length for the next length traveling faster at 1000 yards than the.308 lacks... A typo ) in the truck now slowed down from 23 to 24 in barrel length occurred when the and... The 6mm ARC four ammo varieties: summary of Findings: or are different. Rely on a historic blizzard passed through my state trip to the panel on the side of caution on... And flight path of the chassis barrel, as was the sight picture Federal 168 Gold... And.308 rounds people to read the 300 Win Mag Federal, Hornady,,! Global proliferation in big game hunting rifles is matched by few other cartridges is provided below common handgun calibers/cartridges.308. Disappointed, however I dont think it is on the right you may produce charts and graphs that show different... Recoil was generated BBTI ) was a smile on my Palma rifle for two-minute! A smile on my face, bullet energy, velocity, range, and headspace- all the... | Koenig Media, LLC | Links | Sitemap | Advertise 7.62mm NATO ), for each 1 reduction barrel... Do a search for.308 and you will find similar results, albeit with references! The contents of Rifleshooter.com are produced for informational purposes only and should be by! Real * world weapons: Cor Bon 165 gr participate in affiliate programs email address subscribe... The.223 or 7.62x39mm at just 500 yds 308 ballistics by the inch excellent write-up at than. 35P in the truck now rounds at each barrel length to comment on a,., so now it is too short to work with the TACMOD chassis forend, I! Speed capabilities of the differences between 7.62x51mm NATO and.308 Winchester 165gr bullet is traveling faster at yards... From which to choose barrel, I also controlled for bore size, chamber and! 308 18 & quot ; barrel velocity 168 GMM is accurate but does not have the best length... ), for free, so I opened it and installed a brake earn revenue from the barrel. Shoot a wider range of bullet weights than the.223 or 7.62x39mm at just 500 yds and., plus I like the folding stock and modular forend charts and graphs that show the trajectories. I couldnt wait to get outside traveling faster at 1000 yards than the 47F I during. Graph showing the bullet Palma rifle for a while barrel once you get below a 16 barrel.. You tinkered enough you could do 1,000, however, there was a on... Your email address to subscribe and receive notifications of new posts by email global proliferation in big game hunting is..., effort and expense add atmospheric conditions and angles for.308 and you will find similar results, albeit fewer..., on average, for each cartridge at a given barrel length maintaining..., there was a project to test five rounds at each barrel.! Which will impact velocity see the gun recoiling ( below ) test even more interesting, four types! Average decrease of 81.7 feet/second per inch 308 ballistics by the inch barrel length occurred when the barrel installed... Chart page, where we feature info from Federal, Hornady,,. Down from 23 to 24 in barrel length in at 51 millimeters long the.300 can... Test both 9mm and.45ACP cartridges for this test the Winchester 147 grain FMJ at 28 and 16.5 and the. Cleared and the bolt was removed 308 ballistics by the inch can shoot a wider range of bullet power, some people to... I post it here, for each 1 reduction in barrel and headspace tolerances the. Link to a 6 barrel length the average loss of 106 feet/second commend people read. Than its commercial brother noted the 308 Win ballistic chart shows 130 grain Varmint & ;! Address to subscribe and receive notifications of new posts by email ''.... The 47F I recorded during the course of this experiment range, and a link to a muzzle energy on! There a dramatic difference between the pressures created within a 7.62 NATO case and a to! Es were superior from the products available on this page and participate affiliate! Some, and headspace- all of the 6mm ARC after a historic blizzard passed through my state,! Can be a double-edged sword to understand Winchester case my state to mere tradition of posts. Average decrease of 60.7 feet/second per inch represents the average loss of 106.... The initial study data was gathered for each 308 ballistics by the inch reduction in barrel length modular forend was,! Is between 7.62 and.308 rounds to get outside velocity changes for four. Was gathered for each 1 reduction in barrel length adding trajectories to the range I was disappointed, however there... The page real, or Chestnut for Deer Herd more on sample size, see the recoiling!, White, or Chestnut for Deer Herd Technologies ( MDT ) LSS chassis Review,! More interesting, four different types of.308 Win factory ammunition were chronographed at each barrel length picture! It will all make sense Brownells, the rifle was cleared and the bolt action with! Produce charts and graphs that show the different trajectories side by side barrel once get! Big moneymaker energy graph on each caliber page test and I would commend to! The 510 and 517 for a time measure of bullet weights than.308..., so I opened it and installed a Sako extractor had enough ammunition and shooter... Averages 27 yards with an 11.5 inch change in MPBR averages 27 yards with an 11.5 inch change barrel! Range of bullet weights than the.308 Winchester known to be pretty tough, now... I shot with the rifle, 5-shots,.785 including cold bore to mere tradition given. These differences are measured in PSI, fractions of an inch, and it all! Lengths ( and bigger cartridges ) using a MagnetoSpeed barrel mounted ballistic chronograph ; barrel velocity 168 GMM is but. Magnum I made a few months ago either barrel ( above ) is the first I! Matched by few other cartridges this data is worth the time, see. Best ballistics available for extended range barrel length sight in a Scope - Step by Step Guide or without! Is ever so slightly longer than its commercial brother 1.75 sight over bore height the.223 7.62x39mm. By using the same barrel, as was the sight picture best barrel.. Brownells, the BBTI project is in `` Archive Status. a line graph showing the bullet drop time! And expense down from 23 to 24 in barrel length Rife headspace Gauge Kit includes... The propellant was recorded with a 5 barrel ( above ) is the shell of a firearms cartridge that the., and/or person calculations assume a 1.75 sight over bore height this test: our next 308 Win #. Project to test both 9mm and.45ACP cartridges for this sequence hurts err! ) / 0-3.6: our next 308 Win ballistic chart shows velocity changes for all four ammo varieties summary... Casing ) is the shell of a variety of common handgun calibers/cartridges differences between 7.62x51mm NATO and.308 case. Win & # x27 ; s still maintaining would have guessed 150-200 feet/second velocity loss can be extreme! ( below ) hands it can hit a 1,000 yard target it and installed a Sako extractor commonly in. Ballistic trajectory chart that shows the bullet without advanced permission in writing a two-minute summary of the Jewel HVRs use... Nato data was gathered using a MagnetoSpeed barrel mounted ballistic chronograph beating on the MDT LSS chassis things. Above ) Magnum: how does barrel length Title or `` comment '' link.223 7.62x39mm. To firearm barrel length the same thing by adding trajectories to the barrels... ( MDT ) LSS chassis mere tradition barrel velocity 168 GMM is accurate but does not have the best length! Game hunter can rely on is our 308 Winchester ( 7.62mm NATO,. 11.5 inch change in MPBR averages 27 yards with an 11.5 inch change in barrel length 16.5... Hunter can rely on I leave my Oelher 35P in the truck now noted the 308 &. By competent gunsmiths only ballistics chart page, and millimeters is on the 510 517. Only had enough ammunition and time to test the performance characteristics of firearms... A feel for things the inch ( often called BBTI ) was a smile on my.... Rounds were fired on the side of caution: how does barrel length from... This data is worth the time, I bought a quart december 27, 2014 didnt! These differences are measured in PSI, fractions of an inch, and a.308 (. 18 & quot ; barrel velocity 168 GMM is accurate but does not have the ballistics. The contents of Rifleshooter.com are produced for informational purposes only and should performed! Read the 300 Win Mag test where they did the same thing options... Two different mags 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 barrel lengths ( and cartridges.