.300 HAMR ballistic coefficient chart
G1 and G7 ballistic coefficients for 14 .300 HAMR factory loads from 95 to 150 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| Wilson Combat 95gr. Lehigh CC (A300HMR-95-CC) | 95 | 0.197 | - | 2,800 | 0.890 |
| Wilson Combat 110gr. Barnes TSX (A300HMR-110-TSX) | 110 | 0.264 | - | 2,600 | 0.955 |
| Wilson Combat 110gr. Hornady SP (A300HMR-110-SP) | 110 | 0.256 | - | 2,650 | 0.980 |
| Wilson Combat 110gr. Hornady V-MAX (A300HMR-110-VMAX) | 110 | 0.290 | - | 2,550 | 0.926 |
| Wilson Combat 110gr. Lehigh CC (A300HMR-110-CC) | 110 | 0.260 | - | 2,650 | 0.980 |
| Wilson Combat 110gr. Speer SP (A300HMR-110-SSP) | 110 | 0.273 | - | 2,600 | 0.980 |
| Wilson Combat 125gr. Hornady FMJ (A300HMR-125-FMJ) | 125 | 0.250 | - | 2,440 | 1.000 |
| Wilson Combat 125gr. Sierra PH (A300HMR-125-PH) | 125 | 0.279 | - | 2,540 | 0.955 |
| Wilson Combat 125gr. Speer TNT (A300HMR-125-TNT) | 125 | 0.341 | - | 2,525 | 0.920 |
| Wilson Combat 130gr. Speer Hot-Core (A300HMR-130-HHC-N-BL) | 130 | 0.248 | - | 2,500 | 0.810 |
| Wilson Combat 135gr. Hornady FTX (A300HMR-135-FTX) | 135 | 0.274 | - | 2,380 | 0.900 |
| Wilson Combat 135gr. Sierra HP (A300HMR-135-HP) | 135 | 0.308 | - | 2,380 | 0.967 |
| Wilson Combat 150gr. Hornady SST (A300HMR-150-SST) | 150 | 0.415 | - | 2,310 | 1.203 |
| Wilson Combat 150gr. Speer BTSP (A300HMR-150-BTSP-BLK) | 150 | 0.417 | - | 2,310 | 1.070 |
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.