Load data for .300 Weath. Mag. + 165gr Sierra GameKing
The most recommended powders for this combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
Based on C.I.P., the max. allowed case length is 2.825 in / 71.75 mm, the max. cartridge length is 3.560 in / 90.42 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Based on C.I.P., the max. allowed case length is 2.825 in / 71.75 mm, the max. cartridge length is 3.560 in / 90.42 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Bullet:.308 | 165gr | GameKing
Cartridge:.300 Weath. Mag. load data
Case Length (L3):2.824" | 71.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.517" | 13.1 mm
Case Capacity:98.9 gow | 6.41 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
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Community Loads for .300 Weath. Mag. + 165gr Sierra 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) |
|---|---|---|---|---|---|
| 79.2 gr | 3.560" | 24.0" | 2951 fps | ••• | |
| 80.2 gr | 3.560" | 24.0" | 2988 fps | ••• | |
| 81.3 gr | 3.560" | 24.0" | 3029 fps | ••• | |
| ••• | 3.560" | 24.0" | 3078 fps | ••• | |
| ••• | 3.560" | 24.0" | 3113 fps | ••• | |
| ••• | 3.560" | 24.0" | 3147 fps | ••• | |
| ••• | 3.560" | 24.0" | 3182 fps | ••• | |
| ••• | 3.560" | 24.0" | 2862 fps | ••• | |
| ••• | 3.560" | 24.0" | 2908 fps | ••• | |
| ••• | 3.560" | 24.0" | 2959 fps | ••• | |
| ••• | 3.560" | 24.0" | 3012 fps | ••• | |
| ••• | 3.560" | 24.0" | 3012 fps | ••• | |
| ••• | 3.560" | 24.0" | 3051 fps | ••• | |
| ••• | 3.560" | 24.0" | 3093 fps | ••• | |
| ••• | 3.560" | 24.0" | 3129 fps | ••• | |
| ••• | 3.560" | 24.0" | 2944 fps | ••• | |
| ••• | 3.560" | 24.0" | 2978 fps | ••• | |
| ••• | 3.560" | 24.0" | 3018 fps | ••• | |
| ••• | 3.560" | 24.0" | 3051 fps | ••• | |
| ••• | 3.560" | 24.0" | 3093 fps | ••• | |
| ••• | 3.560" | 24.0" | 3147 fps | ••• | |
| ••• | 3.560" | 24.0" | 3193 fps | ••• | |
| ••• | 3.560" | 24.0" | 3245 fps | ••• | |
| ••• | 3.560" | 24.0" | 2898 fps | ••• | |
| ••• | 3.560" | 24.0" | 2949 fps | ••• | |
| ••• | 3.560" | 24.0" | 2998 fps | ••• | |
| ••• | 3.560" | 24.0" | 3044 fps | ••• | |
| ••• | 3.560" | 24.0" | 3008 fps | ••• | |
| ••• | 3.560" | 24.0" | 3047 fps | ••• | |
| ••• | 3.560" | 24.0" | 3086 fps | ••• | |
| ••• | 3.560" | 24.0" | 3123 fps | ••• | |
| ••• | 3.560" | 24.0" | 2935 fps | ••• | |
| ••• | 3.560" | 24.0" | 2968 fps | ••• | |
| ••• | 3.560" | 24.0" | 3007 fps | ••• | |
| ••• | 3.560" | 24.0" | 3049 fps | ••• | |
| ••• | 3.560" | 24.0" | 2904 fps | ••• | |
| ••• | 3.560" | 24.0" | 2991 fps | ••• | |
| ••• | 3.560" | 24.0" | 3092 fps | ••• | |
| ••• | 3.560" | 24.0" | 2875 fps | ••• | |
| ••• | 3.560" | 24.0" | 2921 fps | ••• | |
| ••• | 3.560" | 24.0" | 2966 fps | ••• | |
| ••• | 3.560" | 24.0" | 3012 fps | ••• | |
| ••• | 3.560" | 24.0" | 2967 fps | ••• | |
| ••• | 3.560" | 24.0" | 3004 fps | ••• | |
| ••• | 3.560" | 24.0" | 3043 fps | ••• | |
| ••• | 3.560" | 24.0" | 3085 fps | ••• | |
| ••• | 3.560" | 24.0" | 3007 fps | ••• | |
| ••• | 3.560" | 24.0" | 3049 fps | ••• | |
| ••• | 3.560" | 24.0" | 3093 fps | ••• | |
| ••• | 3.560" | 24.0" | 3132 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.