The .308 Winchester is a premier medium-to-long-range rifle cartridge, and understanding its ballistics requires tracking its high initial speed and efficient deceleration.
As the bullet travels downrange, its aerodynamic rifle profile preserves speed exceptionally well, allowing a standard 175-grain projectile to drop from 2,600 fps at the muzzle to roughly 1,167 fps at 1,000 yards. The charts below compile manufacturer specifications and practical chronograph data to map out exactly how fast .308 ammunition travels across varying barrel lengths and extreme distances.
At the muzzle, .308 velocities typically range from roughly 2,600 fps for heavy 175-grain match loads up to 2,850 fps for lighter 150-grain hunting rounds.
Table of Contents [Click to minimize]
.308 Velocity Chart at 100 to 1,000 Yards
| Distance (yards) | Distance (meters) | Ammunition / Bullet Weight | Barrel Length (inches) | Estimated Velocity (fps) | Velocity Loss from Muzzle (fps) |
| Muzzle (0) | 0.0 m | Federal GMM 175-gr SMK | 24.0 | 2,600 fps (Published) | 0 fps |
| 100 yards | 91.4 m | Federal GMM 175-gr SMK | 24.0 | 2,420 fps (G1 Calculation) | 180 fps |
| 200 yards | 182.9 m | Federal GMM 175-gr SMK | 24.0 | 2,248 fps (G1 Calculation) | 352 fps |
| 300 yards | 274.3 m | Federal GMM 175-gr SMK | 24.0 | 2,083 fps (G1 Calculation) | 517 fps |
| 400 yards | 365.8 m | Federal GMM 175-gr SMK | 24.0 | 1,925 fps (G1 Calculation) | 675 fps |
| 500 yards | 457.2 m | Federal GMM 175-gr SMK | 24.0 | 1,775 fps (G1 Calculation) | 825 fps |
| 600 yards | 548.6 m | Federal GMM 175-gr SMK | 24.0 | 1,632 fps (G1 Calculation) | 968 fps |
| 700 yards | 640.1 m | Federal GMM 175-gr SMK | 24.0 | 1,498 fps (G1 Calculation) | 1,102 fps |
| 800 yards | 731.5 m | Federal GMM 175-gr SMK | 24.0 | 1,375 fps (G1 Calculation) | 1,225 fps |
| 900 yards | 823.0 m | Federal GMM 175-gr SMK | 24.0 | 1,264 fps (G1 Calculation) | 1,336 fps |
| 1,000 yards | 914.4 m | Federal GMM 175-gr SMK | 24.0 | 1,167 fps (G1 Calculation) | 1,433 fps |
.308 Muzzle Velocity Chart
| Ammunition Type | Bullet Weight (grains) | Barrel Length (inches) | Muzzle Velocity (fps) | Muzzle Energy (ft-lbs) |
| 150-grain FMJ-BT Federal American Eagle [Manufacturer Spec] | 150 | 24.0 (SAAMI Test Barrel) | 2,820 (Advertised) | 2,648 |
| 150-grain FMJ-BT Federal American Eagle [Independent Estimate] | 150 | 20.0 (Standard Rifle) | 2,720 (Estimated) | 2,464 |
| 150-grain FMJ-BT Federal American Eagle [Independent Estimate] | 150 | 16.0 (Carbine) | 2,620 (Estimated) | 2,286 |
| 168-grain BTHP Match Federal Gold Medal Match [Manufacturer Spec] | 168 | 24.0 (SAAMI Test Barrel) | 2,650 (Advertised) | 2,619 |
| 168-grain BTHP Match Federal Gold Medal Match [Independent Estimate] | 168 | 20.0 (Standard Rifle) | 2,560 (Estimated) | 2,444 |
| 168-grain BTHP Match Federal Gold Medal Match [Independent Estimate] | 168 | 16.0 (Carbine) | 2,470 (Estimated) | 2,275 |
| 175-grain BTHP Match Federal Gold Medal Match [Manufacturer Spec] | 175 | 24.0 (SAAMI Test Barrel) | 2,600 (Advertised) | 2,627 |
| 175-grain BTHP Match Federal Gold Medal Match [Independent Estimate] | 175 | 20.0 (Standard Rifle) | 2,515 (Estimated) | 2,458 |
| 175-grain BTHP Match Federal Gold Medal Match [Independent Estimate] | 175 | 16.0 (Carbine) | 2,430 (Estimated) | 2,295 |
| 180-grain Soft Point Winchester Power-Point [Manufacturer Spec] | 180 | 24.0 (SAAMI Test Barrel) | 2,620 (Advertised) | 2,743 |
Factors Affecting Velocity
- Barrel Length: The .308 Winchester relies on medium-burn-rate rifle powders. A general rule of thumb for the .308 is a loss or gain of approximately 20 to 25 fps per inch of barrel length. Dropping from a 24-inch test barrel to a 16-inch tactical carbine will cost roughly 150 to 200 fps in muzzle velocity.
- Bullet Weight: Lighter bullets (like 150-grain or 125-grain variants) leave the muzzle significantly faster due to less mass resisting the expanding gas. Heavier bullets (168-grain and 175-grain) start slower but hold onto their energy much better over long distances.
- Ballistic Coefficient (BC): This is a measure of how efficiently the bullet cuts through the air. Long, sleek boat-tail hollow point (BTHP) match bullets have high BCs, meaning they experience less aerodynamic drag and retain velocity much further downrange compared to blunt-nosed or flat-base bullets.
- Atmospheric Conditions: Air density dictates drag. Shooting in dense air (low altitude, cold temperatures, high barometric pressure) causes the bullet to shed velocity faster. Conversely, at high altitudes or in hot weather, thinner air allows the bullet to fly faster and remain supersonic at longer distances.
Frequently Asked Questions (FAQs)
At what distance does a .308 go subsonic?
A standard 175-grain .308 match load fired from a 24-inch barrel typically drops below the speed of sound (around 1,125 fps depending on temperature) between 950 and 1,050 yards at sea level. Shorter barrels (like 16 or 20 inches) will cause the bullet to go subsonic sooner, typically around the 800-yard mark.
Why do snipers and long-range shooters prefer 175-grain bullets if 150-grain bullets are faster?
While 150-grain bullets start faster, they have a lower Ballistic Coefficient. They shed their velocity quickly and are blown off course by the wind much more easily. A 175-grain Sierra MatchKing starts slower but cuts through the wind better and overtakes the 150-grain bullet in retained velocity at extended ranges.
Is a 16-inch barrel too short for a .308 Winchester?
No. While you lose about 150–200 fps compared to a 24-inch barrel, a 16-inch .308 is still highly effective. It delivers massive kinetic energy at close-to-medium ranges and remains easily capable of accurately hitting targets out to 600–800 yards before transonic instability becomes a major issue.
How much velocity does a .308 lose in the first 100 yards?
A typical 168-grain or 175-grain .308 bullet loses between 160 and 190 fps in its first 100 yards of flight. Because it is highly aerodynamic, this rate of loss steadily decreases as the bullet moves downrange.