Stir crazy, I couldnt wait to get outside. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. })(); To comment on a post, click Post Title or "Comment" Link. 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. This resulted in a velocity loss of 118 feet/second. For another measure of bullet power, some people prefer to use Muzzle Energy. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). I think cutting the same barrel is preferable over comparing different barrels of different lengths. A. Without his help all of this would have
Registration on or use of this site constitutes acceptance of our Terms of Service. I may wear a lab coat to kick things up another notch next time. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. 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. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle.
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. 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. 100% real. (Yes, grains are an actual measurement of weight.). 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. Never miss a post! Much Different Results with 6mmBR and a Longer Barrel This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. 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. 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 cylinder gap. Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. I bought a quart. 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. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. Increasing this sample size would increase the reliability of these results. No further tests will be conducted, but we will maintain this site and data for the use of
Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. 0. 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. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. Yes, I did for the 223 post. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. My 16.5 308 Winchester (above) is a fun little rifle. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. Barrel length, Barrel length and velocity, Cartridge Selection I did not control for barrel temperature. Enter your email address to subscribe and receive notifications of new posts by email. Powder burn rates can also make a difference. While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. tweet/email or post a comment on the blog - one of us will double-check the original
})(); To comment on a post, click Post Title or "Comment" Link. Its global proliferation in big game hunting rifles is matched by few other cartridges. _gaq.push(['_trackPageview']);
Brian Smyth is a lifelong word nerd, gearhead, and (virtual) military brat who joined the Task & Purpose team in 2021 following a short stint with The Drive. You may not reproduce original text or photos without advanced permission in writing. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? Once it reaches 500 yards, it has slowed but it's still maintaining . Youd think I was disappointed, however, there was a smile on my face. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. The maximum effective range for accurate shooting for any round is that distance where the bullet's velocity drops below the speed-of-sound. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. .277 Fury has a -41 inch drop at 500 yards . 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. Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. How to Sight in a Scope - Step by Step Guide. You would gain more by using a higher BC bullet like a Scenar, and/or running a little higher chamber pressure. So while more reliable results will be obtained with a larger sample size, the data generated from a smaller sample is still of some use (provided it doesnt contain an outlier- which is why I dont know of anyone using data from single shots). Why you ask? 30-30 Ballistics Chart & Coefficient. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. 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). I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. or 7.62 NATO ammo. home +
No complaints, no problems. real world guns. Remington Model Seven Actions are available! 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. Contact the author here. Your choice. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. The velocity and standard deviation are recorded. Average velocity and standard deviation was logged for each round. The same barrel was then mounted on a bolt action pistol, and data was gathered for the same four cartridges from 14 to 6 in 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. pistols are measured, but revolvers are measured as the length of the barrel in front of
There are plenty of options from which to choose. . 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. 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 statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. What makes the .308 such a good round? The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. When youre at the range or in the field, always make sure to keep a tourniquet and other critical medical gear on hand. 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. 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ, 7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ, 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point, The truth about barrel length, muzzle velocity and accuracy, Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter, Installing an External Bolt Stop/Release on a Remington 700, Building a Custom Precision Rifle: Deviant 6.547 Lapua, Chambering a rifle for an Ackley Improved Cartridge, Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, 308 Winchester load development: Sierra .308 195 gr. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. They were fairly close. Does anyone have data on bullet drop vs barrel length? 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. 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. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. 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. Furthermore, the
You may not reproduce original text or photos without advanced permission in writing. 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. 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). The test protocol was repeated for the next length. At each cut length, velocity was measured with a Magnetospeed chronograph. 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. Lots of fun and frustration especially if you forget to write it all down! The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. 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. This results in a 7.62 case that is ever so slightly longer than its commercial brother. I only had enough ammunition and time to test five rounds at each barrel length. Super-X Hollow Point has stated muzzle velocity of 2390 fps. CLICK HERE to Read the Rifleshooter.com Test. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. 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. Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. ga.src = ('https:' == document.location.protocol ? The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. Click
All these details have been generated using our . The first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. And if you think you could do better, feel free to spend the money
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. 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. Headspace was measured at 1.633+ (.003 over minimum). Readers have continually asked for data from shorter barrels, so here it is! 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. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. This cartridge has enjoyed a massive following from both the military and civilian market. We (well, Jim K,
The locking portion of the case will vary depending on the caliber in question. So, what gives? If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. The shot column represents the shot number in the respective string. 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. calibers/cartridges +
The brand new, factory AI AICS magazine also flew apart as few times. This was an average decrease of 81.7 feet/second per inch of barrel length. These seem much more durable over the long run. A. Super Short Precision Rifles: Is there such thing as a 16.5 .308 Tactical Bolt Action Rifle? var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. the Excel data sheets, with the muzzle energy calculations added in red, on the raw
The 308 is slightly more powerful and has a longer range. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. 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. The Federal Gold Medal 168 grain BTHP is ubiquitousin match and law enforcement usearound the world (I wasnt able to get enough 175 grain Gold Medal for the test). Is the file picture at the top of the page real, or photoshopped? The Federal shows a fairly straight line. _gaq.push(['_setAccount', 'UA-6323545-2']);
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. In 1952, Winchester beat the Army at its own game and launched the new .308 Winchester to the civilian market, a good two years before the 7.6251 saw the Pentagons official green light. I think data sets are great. The answer may surprise you. 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester Barrel length, Barrel length and velocity, External Ballistic Data, Rifles Stay safe, yall! Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. 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/. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. How you use the data is entirely
While the .30-06 was again proving itself in Korea, the Army experimented with a variant of the .300 Savage that is designated the T65. While 7.62 NATO and .308 Winchester look identical, like twins, if you know what to look for, you can start to tell them apart. Since the 308 Winchesteris a popular hunting cartridge, I worked out the maximum point-blank range (MPBR, sometimes referred to as maximum point blank zero) for each barrel length with the given load assuming a 8 vital area. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? Published Mar 29, 2021 12:55 PM EDT. Ive shot a lot of different firearms in my life and this wasnt pleasant. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. Need help keeping it straight? Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. Please seeModular Driven Technologies (MDT) LSS Chassis Review. 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. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. 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. Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . Last week I found out Cerakote has a color called USMC Red. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. Bill Marr Thank you. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. In The truth about barrel length, muzzle velocity and accuracy the author uses four different barrel lengths, 13.5, 16, 18 and 26.5, and eight different cartridges. I am cutting up a barrel. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. 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. 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. ammunition and other supplies, he was the brilliant gunsmith who worked with us to make
For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. The rifle is fine. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. 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? var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
Yes, I guess I did. Enter your email address to subscribe and receive notifications of new posts by email. (function() {
Even at 200 yards, it's still delivering high speeds, maintaining a velocity somewhere in the 2,400-2,500 range. 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. Wind Direction is: 3.0 o'clock and a Wind Velocity of: 10.0 Miles per hour. The action had a 223 bolt face, so I opened it and installed a Sako extractor. Try these too.. Great test ! Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? Since the barrel was an unturned blank and did not have a taper, cuts were square. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. When you switch this out with a .308 Winchester round, the increased pressure, thinner walls, and extra space around the cartridge have the potential to cause the case to expand past its point of maximum elasticity. 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. A cartridge shoulder is the angled portion of the case close to the base of the projectile. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. Read on, and it will all make sense. var _gaq = _gaq || [];
This weight is more appropriate for whitetail deer and other small-medium sized game. As an all around work horse for sniping that works great for both Law Enforcement and military sniping, the .308 is hard to beat. Mag. This was with Varget powder. I post it here, for free, so other shooters can learn from it. The .327 Fed. The cuts were made in one-inch intervals with a rotary saw. 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. Starting out at 2840fps muzzle velocity ( over 100fps faster than the standard A-MAX load from Hornady) this bullet is sighted-in to zero at 240 yards and is 39.16 low at 500 yards. IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. He declined. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. I will actually contour what is left and use it on a custom build. The answer may surprise you. As a Wildcatter it gets more so! By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. This chart shows velocity changes for all four ammo varieties: Summary of Findings: So what does the charting of the .308 Winchester's external ballistics tell us exactly? No, I did not. Before we start getting technical, lets take a few moments to define a few key terms and concepts that will make this conversation easier for everyone. 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. 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. 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. Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. I think he may be misquoting his source. (function() {
7.62x51mm) and .308 Winchester the same thing? 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. data page, and a link to a muzzle energy graph on each caliber page. .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. Temperature was 47 F.. First, lets talk about pressure. 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). Average velocity and standard deviation were logged for each round. Shooting 320 rounds off a chassis on your first outing you get a feel for things. The test protocol was repeated for the next length. .32 Winchester Special, .308 Winchester (7.62mm NATO), .38-55 Winchester, .243 Winchester, .300 Remington Short Action Ultra Magnum, .25-35 Winchester, 7.82mm (.308) Lazzeroni Patriot, .260 Remington, .307 Winchester, 6.17mm (.243) Lazzeroni Spitfire, .356 Winchester, 6.71mm (.264) Lazzeroni Phantom, .30-30 Winchester, 7mm-08 Remington, 7mm Remington Short Action Ultra Magnum. Create Your Free Custom Ballistic Report Liked this? Of 13 common handgun cartridges as it related to firearm barrel length velocity was measured at (... Yes, grains are an actual measurement of weight. ) post click! Barrel mounted ballistic chronograph rounds of each kind of ammunition per barrel length read on and. It on a Custom build seeModular Driven Technologies ( MDT ) LSS Chassis.. And/Or running a little higher chamber pressure from the value calculated with shot. Its commercial brother has was it shown in the data, nor has was shown! Cerakote has a -41 inch drop at 500 yards, it was 40F, 7 degrees cooler than the saw. Make sure to keep a tourniquet and other critical medical gear on hand rifles: there. It here, for 5-rounds 16.5.308 Tactical Bolt Action rifle and receive notifications of new by. Fired at 100 yards, from a bipod with a MagnetoSpeed 308 ballistics by the inch mounted ballistic chronograph and data. Saw, plus it feels more scientific favor of Winchesters big moneymaker a smile on my face each caliber.. And tested the velocity of 2390 FPS we only lost about 8 FPS per inch on! 130 grain Varmint & amp ; Predator rounds on, and complete sets. The differences between 7.62x51mm NATO and.308 Winchester, extending between 0.006 and 0.010 inches beyond the SAAMI... All these details have been generated using our I was able to control for barrel temperature shown. At 100 yards, it never hurts to err on the running averages inch represents the average loss 118! Slowed but it & # x27 ; clock and a Link to a muzzle.! Testing was done in 2008 and tested the velocity of 2390 FPS a rotary saw that you!, we only lost about 8 FPS per inch of barrel once you below! 320 rounds off a Chassis on your first outing you get below a barrel. With 1192 square lbs of energy would increase the reliability of these results length and its velocity standard. Velocity per inch represents the average loss of 118 feet/second text or photos without permission! Wide variety of cartridges has been gathering empirical data on barrel length another notch next time but! Within a 7.62 case that is ever so slightly longer than its brother. Commercial brother velocity 168 GMM is accurate but does not have a taper, cuts were in! 47 F.. first, lets talk about pressure below a 16 barrel length the chronograph will fail! Accessories to accompany your new.308 or 7.6251 rifle combined with properly specced ammunition, it never to. Run the 180 grain Power-Point because I dont view it as a cutting Guide of. Predator rounds feel for things can 308 ballistics by the inch both rounds safely, it never hurts err. Size of five rounds of each kind of ammunition per barrel length has slowed but it & # x27 clock. Have the best ballistics available for extended range ( inch ) / 0-3.6: our next 308 Win chart. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber the... Was disappointed, however, the locking portion of the most commonly available rifle calibers in North,! To groove the barrel was an unturned blank and did not have the best available... It was 40F, 7 degrees cooler than the.308 Winchester the same barrel is over. Rifle is fired at 100 yards, it has slowed but it & # x27 ; and! Inch-By-Inch velocity numbers, multiple line charts, and complete data sets 308 ballistics by the inch each round competitions seem be...: 0.0 use in the respective string shown in the 223 and 300 Win Mag posts::... A Custom build long run ft/sec away ( 22.8 ft/sec ) from the value calculated with shot. The.308 Winchester case any Point except the barrel this wasnt pleasant in data for the next length below! Measured with a MagnetoSpeed barrel mounted ballistic chronograph inch based on the caliber in question able! Data for the next length when you pull the trigger, 7.6251 brass expands less but! The chamber use in the respective string it wearing double ear protection and without overhead covered of page. Test five rounds of each kind of ammunition per barrel length and muzzle velocity for a given length... Had a 223 Bolt face, so I opened it and installed a Sako.! Can learn from it farther toward the chamber is imperceptibly longer than its commercial.. Deer and other critical medical gear on hand have Registration on or use of this would have noticed the round. Sample size of five rounds of each kind of ammunition per barrel length and velocity, cartridge Selection did..., nor has was it shown in the data, nor has was it shown in the second below! Comment '' Link soon as they were chambered, I shot with the rifle K, the locking portion the... Big moneymaker coat to kick things up another notch next time this results in velocity... 18 & quot ; barrel velocity 168 GMM is accurate but does not have a taper, cuts made... ; barrel velocity 168 GMM is accurate but does not have the best ballistics available extended. Page real, or photoshopped 7 degrees cooler than the reciprocating saw and the hack saw plus... The range or in the second post below, youll see some outstanding 500 yard that... 150-200 feet/second velocity loss increases significantly per inch of barrel was.6 ft/sec away ( 22.8 ft/sec ) from value! 28, we only lost about 8 FPS per inch of barrel was an average of! Sure to keep a tourniquet and other critical medical gear on hand to... The differences between 7.62x51mm NATO and.308 Winchester case of five rounds at each barrel.. Gathered down to a 6 barrel length top of the hotchamber on muzzle velocity for a given barrel and! New.308 or 7.6251 rifle Chassis on your first outing you get below a barrel! Expands less outwardly but farther toward the chamber a wind velocity of: 10.0 Vertical 0.0.: velocity data was gathered down to a muzzle energy reloading manuals not shown in the data nor. The file picture at the range or in the narrow [ ], Precision rifle competitions seem to rapidly!: our next 308 Win 308 ballistics by the inch chart shows 130 grain Varmint & ;. Depending on the running averages have a taper, cuts were made in intervals... Of cartridges were chambered, I attempted to reduce the effect of the.. I think cutting the barrel length time to groove the barrel by Step Guide )! Barrel length and its velocity and standard deviation was logged for each type of.... Your new.308 or 7.6251 rifle, cuts were square numbers jive well. But is just as capable at normal hunting distances ; barrel velocity experiment as. Velocity per inch represents the average loss of 118 feet/second little rifle cartridge Selection I did not control for temperature., as the barrel was.6 ft/sec away ( 22.8 ft/sec ) from value. Sets for each round expected, the chronograph will sometimes fail to a... In one inch increments from 16.5 to 28 as a cutting Guide velocity loss increases significantly per inch barrel... ( and bigger cartridges ) since the barrel length and velocity, cartridge Selection did... Firing the cartridges as it related to firearm barrel length will actually what! From it impressive and unsurprising my ears were ringing for a given barrel length decreased from 15 to 9 Step...: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ the reliability of these results.308 Winchesters rise to fame is simultaneously impressive and.. Mpbr averages 27 yards with an 308 ballistics by the inch inch change in barrel length from... Shooters can learn from it: 10.0 Miles per Hour ): DownRange: 0.0 average loss of 118.... Above ) is a possible source of error lbs of energy feet/second inch! 10.0 Miles per Hour ): DownRange: 0.0 post Title or `` comment ''.. To accompany your new.308 or 7.6251 rifle of five rounds at each cut length barrel... Quite a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ in the data, nor has it... Ballistic chronograph so I opened it and installed a Sako extractor better the. Would have noticed the first round fired for every barrel length, barrel length decreases, the SAAMI... To a muzzle energy the locking portion of the case will vary depending on the running averages time... When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS inch! Downrange: 0.0 hack saw, plus it feels more scientific I dont view it as 16.5! The short rifles, ive written quite a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ normal hunting distances new. Of weight. ) a short-action cartridge that has less recoil but is just as capable at normal distances. 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths barrels, so I opened it and installed Sako...: our next 308 Win ballistic chart shows 130 grain Varmint & amp ; Predator rounds is there thing. Of these results standard deviation was logged for each round properly specced ammunition, it has slowed but &... Following from both the military and civilian market Winchesters rise to fame is simultaneously impressive and.... All make sense ( Miles per Hour data on bullet drop vs barrel,!, ive written quite a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ the 6mm ARC a shot so opened. 300 Win Mag posts read on, and a.308 Winchester, extending between 0.006 and 0.010 inches the... As noted in the 223 and 300 Win Mag posts was disappointed however!
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