.303 British ballistic coefficient chart
G1 and G7 ballistic coefficients for 19 .303 British factory loads from 150 to 180 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| Federal 150-grain Hi-Shok Soft Point (303B) | 150 | 0.357 | - | 2,690 | - |
| Hornady 150-grain Soft Point (8225) | 150 | 0.361 | - | 2,685 | - |
| Hornady 150-grain SP-Light Magnum | 150 | 0.356 | - | 2,830 | - |
| PMP 150gr. SP | 150 | 0.328 | - | 2,625 | - |
| PPU 150gr. SP BT (A-382) | 150 | 0.379 | - | 2,690 | - |
| Sellier & Bellot 150gr. SP (V331312) | 150 | 0.283 | - | 2,654 | - |
| PMC 174-grain Full Metal Jacket (303A) | 174 | 0.459 | - | 2,400 | - |
| PMC 174-grain Hollow Point Boat Tail Match (303SMA) | 174 | 0.495 | - | 2,425 | - |
| PMP 174gr. FMJ BT | 174 | 0.475 | - | 2,451 | - |
| PMP 174gr. SP | 174 | 0.391 | - | 2,451 | - |
| PPU 174gr. FMJ BT (A-143) | 174 | 0.506 | - | 2,460 | - |
| UMC (Remington) 174-grain MC (L303B1) | 174 | 0.315 | - | 2,475 | - |
| Federal 180-grain Speer Hot-Cor SP (303AS) | 180 | 0.370 | - | 2,460 | - |
| PMC 180-grain Soft Point (303B) | 180 | 0.486 | - | 2,450 | - |
| PMC 180-grain Soft Point Boat Tail (303HB) | 180 | 0.486 | - | 2,450 | - |
| PPU 180gr. SP BT (A-125) | 180 | 0.404 | - | 2,460 | - |
| Remington 180-grain Soft Point Core-Lokt (R303B1) | 180 | 0.247 | - | 2,460 | - |
| Sellier & Bellot 180gr. FMJ (V331302) | 180 | 0.470 | - | 2,477 | - |
| Winchester 180-grain Power-Point (X303B1) | 180 | 0.370 | - | 2,460 | - |
Using these numbers
A ballistic coefficient describes how well a bullet keeps its speed against air resistance, compared with a standard reference projectile. G7 figures suit long, boat-tailed match and hunting bullets and stay more consistent across velocities; G1 figures are larger numbers for the same bullet and are what most manufacturers have published historically. Use whichever your calculator asks for, but never mix a G1 number with the G7 drag model.
Every load here is in the ballistic calculator's bullet library — search for it to build a range card in one step, then true the velocity against your own chronograph. For a ready-made drop table, see the .303 British ballistics chart .