| Cat | Type | Usage | Federal Load No | Caliber | Bullet Weight in Grains | Bullet Weight in Gram | Point | Bullet Style | Primer No |
| Premium | Hunting | Medium Game | P257B | 257 Roberts (High-Velocity + P) | 120 | 7.77 | Nosler Partition |
| Energy (F.P.S.) Muzzle |
Energy (F.P.S.) 100yds |
Energy (F.P.S.) 200yds |
Energy (F.P.S.) 300yds |
Energy (F.P.S.) 400yds |
Energy (F.P.S.) 500yds |
| 210 | 2780 | 2560 | 2360 | 2160 | 1970 |
| Energy (ft.-lbs.) Muzzle |
Energy (ft.-lbs.) 100yds |
Energy (ft.-lbs.) 200yds |
Energy (ft.-lbs.) 300yds |
Energy (ft.-lbs.) 400yds |
Energy (ft.-lbs.) 500yds |
| 1790 | 2060 | 1750 | 1480 | 1240 | 1030 |
| Wind drift inches 100yds | Wind drift inches 200yds | Wind drift inches 300yds | Wind drift inches 400yds | Wind drift inches 500yds |
| 855 | 0.8 | 3.3 | 7.7 | 14.3 |
| 50yds Average Range | 100yds Average Range | 200yds Average Range | 300yds Average Range |
| 23.5 | -0.1 | - | -3.8 |
| 50yds Long Range | 100yds Long Range | 200yds Long Range | 300yds Long Range | 400yds Long Range | 500yds Long Range | Test Barrel Length Inches | Description |
| -14 | 0.8 | 1.9 | - | -8.2 | -24 | -48.9 | 24 |