.458 Winchester Magnum ballistic coefficient chart
G1 and G7 ballistic coefficients for 14 .458 Winchester Magnum factory loads from 350 to 510 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| Federal 350-grain Soft Point (P458A) | 350 | 0.171 | - | 2,470 | - |
| Federal 400-grain Trophy Bonded Bear Claw (P458T1) | 400 | 0.382 | - | 2,380 | - |
| Remington 450-grain Swift A-Frame PSP (RS458WA) | 450 | 0.309 | - | 2,150 | - |
| A2 465-grain Dead Tough SP, Monolithic Solid, Lion Load SP | 465 | 0.358 | - | 2,220 | - |
| PMP 475gr. Solid | 475 | 0.271 | - | 2,067 | - |
| Federal 500-grai Speer African Grand Slam Solid (P458C) | 500 | 0.348 | - | 2,090 | - |
| Federal 500-grain Speer African Grand Slam (P458B) | 500 | 0.285 | - | 2,090 | - |
| Federal 500-grain Trophy Bonded Bear Claw (P458T2) | 500 | 0.342 | - | 2,090 | - |
| Federal 500-grain Trophy Bonded Sledgehammer (P458T3) | 500 | 0.336 | - | 2,090 | - |
| Norma 500-grain Barnes Solid (11110) | 500 | 0.235 | - | 2,067 | - |
| Norma 500-grain Swift TXP (11120) | 500 | 0.361 | - | 2,116 | - |
| Speer 500-grain African GS Soft Point (24518) | 500 | 0.286 | - | 2,025 | - |
| Speer 500-grain African GS Tungsten Solid (24519) | 500 | 0.278 | - | 2,050 | - |
| Winchester 510-grain Soft Point (X4581) | 510 | 0.275 | - | 2,040 | - |
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.