Load data for .257 Weath. Mag. + 120gr Sierra HPBT GameKing
412 suitable loads across 67 powder(s) for cartridge .257 Weath. Mag. with 120gr Sierra HPBT GameKing bullet.
The most recommended powders for this combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Accurate MAGPRO.
Based on C.I.P., the max. allowed case length is 2.549 in / 64.74 mm, the max. cartridge length is 3.209 in / 81.51 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.549 in / 64.74 mm, the max. cartridge length is 3.209 in / 81.51 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
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Community Loads for .257 Weath. Mag. + 120gr Sierra HPBT GameKing
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 56.4 gr | 3.170" | 24.0" | 2785 fps | ••• | |
| 59.2 gr | 3.170" | 24.0" | 2898 fps | ••• | |
| 61.9 gr | 3.170" | 24.0" | 3004 fps | ••• | |
| ••• | 3.170" | 24.0" | 2925 fps | ••• | |
| ••• | 3.170" | 24.0" | 3038 fps | ••• | |
| ••• | 3.170" | 24.0" | 3090 fps | ••• | |
| ••• | 3.170" | 24.0" | 2851 fps | ••• | |
| ••• | 3.170" | 24.0" | 2983 fps | ••• | |
| ••• | 3.170" | 24.0" | 2947 fps | ••• | |
| ••• | 3.170" | 24.0" | 2740 fps | ••• | |
| ••• | 3.170" | 24.0" | 2824 fps | ••• | |
| ••• | 3.170" | 24.0" | 2945 fps | ••• | |
| ••• | 3.170" | 24.0" | 3095 fps | ••• | |
| ••• | 3.170" | 24.0" | 3181 fps | ••• | |
| ••• | 3.170" | 24.0" | 2856 fps | ••• | |
| ••• | 3.170" | 24.0" | 2955 fps | ••• | |
| ••• | 3.170" | 24.0" | 2818 fps | ••• | |
| ••• | 3.170" | 24.0" | 2939 fps | ••• | |
| ••• | 3.170" | 24.0" | 3049 fps | ••• | |
| ••• | 3.170" | 24.0" | 3100 fps | ••• | |
| ••• | 3.170" | 24.0" | 2616 fps | ••• | |
| ••• | 3.170" | 24.0" | 2740 fps | ••• | |
| ••• | 3.170" | 24.0" | 2857 fps | ••• | |
| ••• | 3.170" | 24.0" | 2961 fps | ••• | |
| ••• | 3.170" | 24.0" | 3051 fps | ••• | |
| ••• | 3.170" | 24.0" | 3096 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.