History
Winchester introduced the .308 Winchester in 1952, two years before NATO formally adopted its military twin, the 7.62x51mm.1 Both came out of the same place, a postwar United States Army program called T65 that set out to match .30-06 Springfield performance in a shorter case. A shorter case meant a shorter, lighter action, easier feeding in semi-automatic and select-fire rifles, and less weight for the soldier to carry into the field.
Winchester saw a sporting market in the design and brought it to civilian shooters first, chambering it in the Model 70 bolt action and the Model 88 lever gun. The cartridge spread quickly because it did almost everything the venerable .30-06 did while fitting a trimmer, faster-handling rifle.
In the decades since, the .308 became the benchmark .30 caliber for precision work. Military and police sniper systems like the M24 and M40 were built around it, and it anchored the early years of tactical and F-class competition. Its blend of inherent accuracy, manageable recoil, and short-action efficiency is why it remains the cartridge most shooters meet first when they step into long range.
Lineage
The .308 wears the same .473 inch case head as the .30-06 Springfield, which is what the industry calls a standard, non-magnum bolt face. It started life as a shortened .30-06, reworked through the T65 experiments into the 51mm case we know today, and it pushes a .308 inch (7.82mm) bullet.
Where the .308 really won its place is as a parent case, and few designs have spawned a larger family. Necked down, it became the .243 Winchester in 1955 (6mm), the 7mm-08 Remington in 1980 (7mm), and the .260 Remington in 1997 (6.5mm). Necked up, it became the .358 Winchester in 1955 and the .338 Federal in 2006. There is even a rimmed version, the .307 Winchester, built for lever actions.2
The .308 sits in the middle of a family tree, a descendant of the .30-06 line and the parent of a whole generation of short-action cartridges that shooters still build on today.
Specifications
| Spec | Value |
|---|---|
| Case type | Rimless, bottlenecked |
| Bullet diameter | 7.82 mm (.308 in) |
| Neck diameter | 8.72 mm (.3433 in) |
| Base diameter | 11.96 mm (.4709 in) |
| Rim diameter | 12.01 mm (.4728 in) |
| Case length | 51.18 mm (2.015 in) |
| Overall length | 71.12 mm (2.800 in) |
| Case capacity | ~56 gr H2O (nominal; 55 to 58 by brand)3 |
| Primer size | Large rifle |
| Belted | No |
| Rifling twist | 1 in 12 in (SAAMI and C.I.P. standard); 1 in 10 in common today4 |
| Max pressure | 62,000 psi / 427 MPa (SAAMI)5; 4,150 bar / 415 MPa (C.I.P.)4 |
| Recommended barrel | 28 in, 1:10 twist |
Barrel Design
For the .308 specifically, the cartridge is efficient and burns most of its powder by roughly 22 inches. Past that point velocity still climbs, but the rate slows down. A useful rule of thumb is somewhere near 20 to 25 feet per second per inch in the 20 to 26 inch range, and that gain keeps shrinking the longer you go. Stretching a .308 from 24 to 28 inches gives you something close to 80 to 100 fps, which is real and worth having when you are working the far edge of the cartridge.
There is a consistency argument for length too. A longer barrel lets slower powders finish burning inside the bore, which can tighten your velocity spread and pull standard deviation down. That effect is real, but it sits downstream of load development. Clean brass, uniform charge weights, and good primers move your SD far more than two inches of barrel ever will.
Where does that leave a recommendation? For the long-range mission this site is built around, lean long. I put the .308 baseline at 28 inches, which captures nearly all of the available velocity without the full weight and whip of a 30 inch tube. If you shoot F-class, ELR, or anything where every foot per second pushes your transonic window farther out, a full 30 inch tube is worth it. If you shoot PRS or any positional game where you are building barricades and moving under a clock, most .308 shooters still run 24 inches. A shorter barrel handles quicker, but the velocity you give up costs you more in wind and elevation than the balance gives back.
The tables on this page are computed at the 28 inch recommended barrel. Factory velocities are published at 24 inches, so I scale them up by about 22 feet per second per inch and label that estimate in each table footer. Your rifle will land near these numbers rather than exactly on them, so chronograph your own velocity and true your BC against real drops before you trust a dial past 1,000 yards.
Range Ammo Performance
Igman · 147 gr M80 Ball FMJBT $0.79/rd
| Range (yd) | Velocity (fps) | Elevation (mil) | Energy (ft-lb) | Windage (mil) |
|---|---|---|---|---|
| 0 | 2823 | -0.5 | 2601 | 0.5 |
| 100 | 2606 | 0.0 | 2216 | 0.2 |
| 200 | 2398 | -0.5 | 1877 | 0.5 |
| 300 | 2200 | -1.2 | 1580 | 0.8 |
| 400 | 2012 | -2.1 | 1322 | 1.1 |
| 500 | 1833 | -3.1 | 1096 | 1.4 |
| 600 | 1661 | -4.2 | 900 | 1.8 |
| 700 | 1496 | -5.6 | 731 | 2.2 |
| 800 | 1340 | -7.1 | 586 | 2.7 |
| 900 | 1193 | -9.0 | 465 | 3.2 |
| 1000 | 1083 | -11.1 | 383 | 3.8 |
| 1100 | 1031 | -13.6 | 347 | 4.3 |
| 1200 | 990 | -16.5 | 320 | 4.9 |
| 1300 | 954 | -19.7 | 297 | 5.4 |
| 1400 | 920 | -23.2 | 276 | 6.0 |
| 1500 | 888 | -27.0 | 257 | 6.5 |
| 1600 | 858 | -31.2 | 240 | 7.0 |
Muzzle velocity 2823 fps is estimated at 28 in from the 24 in factory figure of 2735 fps at about 22 fps per inch. Expect your own barrel to read a little differently. Velocity is color coded green supersonic, yellow transonic, red subsonic; treat transonic and subsonic rows as approximate.
Match Ammo Performance
Federal Gold Medal Match · 175 gr Sierra MatchKing HPBT $1.36/rd
| Range (yd) | Velocity (fps) | Elevation (mil) | Energy (ft-lb) | Windage (mil) |
|---|---|---|---|---|
| 0 | 2688 | -0.5 | 2807 | 0.4 |
| 100 | 2513 | 0.0 | 2454 | 0.2 |
| 200 | 2345 | -0.5 | 2137 | 0.4 |
| 300 | 2184 | -1.3 | 1853 | 0.7 |
| 400 | 2029 | -2.2 | 1600 | 0.9 |
| 500 | 1880 | -3.2 | 1373 | 1.2 |
| 600 | 1736 | -4.3 | 1172 | 1.5 |
| 700 | 1598 | -5.6 | 992 | 1.9 |
| 800 | 1464 | -7.1 | 833 | 2.2 |
| 900 | 1336 | -8.7 | 693 | 2.6 |
| 1000 | 1215 | -10.6 | 573 | 3.1 |
| 1100 | 1109 | -12.7 | 478 | 3.5 |
| 1200 | 1055 | -15.1 | 433 | 4.0 |
| 1300 | 1018 | -17.9 | 402 | 4.5 |
| 1400 | 985 | -20.9 | 377 | 5.0 |
| 1500 | 955 | -24.2 | 355 | 5.4 |
| 1600 | 927 | -27.8 | 334 | 5.9 |
Muzzle velocity 2688 fps is estimated at 28 in from the 24 in factory figure of 2600 fps at about 22 fps per inch. Expect your own barrel to read a little differently. Velocity is color coded green supersonic, yellow transonic, red subsonic; treat transonic and subsonic rows as approximate.
Trajectory
FAQ
Is the .308 Winchester good for long range?
Yes, within its window. With match ammo from a 26 inch barrel it holds supersonic velocity to roughly 1,000 yards, which covers most precision rifle competition and field shooting. Past that the bullet drops into the transonic zone and wind drift grows, so shooters who live at 1,200 yards and beyond usually step up to a 6.5mm or a magnum .30.
What barrel twist does the .308 Winchester use?
The SAAMI reference twist rate is 1 turn in 12 inches,4 but nearly every modern precision and hunting rifle uses a faster 1 in 10, which stabilizes the heavier 168 to 175 grain match bullets with more margin. For 200 grain bullets and up, look for 1 in 10 or faster.
How does the .308 Winchester compare to the .30-06 Springfield?
The .30-06 holds more powder and beats the .308 by roughly 100 to 150 fps with the same bullet weight. The .308 trades that velocity for a shorter, lighter, stiffer short action that many shooters find easier to shoot accurately. For long range the velocity gap rarely shifts your dope enough to matter.
What is the effective range of the .308 Winchester?
Match ammo holds supersonic velocity to about 1,000 yards and stays effective on game well past 500 yards. Beyond 1,000 the bullet enters the transonic zone where groups open up, so most shooters treat 1,000 yards as the practical effective range ceiling.
Citations
- (2005). 30 Light Rifle (T-65). CartridgeCollector.net. accessed 2026-05-30.
- Frank C. Barnes, W. Todd Woodard. (2019). Cartridges of the World, 16th Edition. Gun Digest Books.
- (1991). Hornady Handbook of Cartridge Reloading, 4th Edition. Hornady Manufacturing Company.
- (2008). C.I.P. TDCC Datasheet — .308 Winchester (7.62 x 51). Commission Internationale Permanente (C.I.P.). accessed 2026-05-30.
- (2015). ANSI/SAAMI Z299.4 Centerfire Rifle — Maximum Average Pressure. SAAMI. accessed 2026-05-30.