Load data for .25 WSSM + 90gr Sierra GameKing
Based on C.I.P., the max. allowed case length is 1.670 in / 42.42 mm, the max. cartridge length is 2.360 in / 59.94 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 1.670 in / 42.42 mm, the max. cartridge length is 2.360 in / 59.94 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Bullet:.257 | 90gr | GameKing
Cartridge:.25 WSSM load data
Case Length (L3):1.670" | 42.4 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.308" | 7.8 mm
Case Capacity:54.3 gow | 3.52 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:13.0
Get PRO license to unlock all data and calculators
Community Loads for .25 WSSM + 90gr 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) |
|---|---|---|---|---|---|
| 41.3 gr | 2.360" | 26.0" | 3131 fps | ••• | |
| 44.8 gr | 2.360" | 26.0" | 3142 fps | ••• | |
| 45.6 gr | 2.360" | 26.0" | 3190 fps | ••• | |
| ••• | 2.360" | 26.0" | 3241 fps | ••• | |
| ••• | 2.360" | 26.0" | 3290 fps | ••• | |
| ••• | 2.360" | 26.0" | 3337 fps | ••• | |
| ••• | 2.360" | 26.0" | 3010 fps | ••• | |
| ••• | 2.360" | 26.0" | 3060 fps | ••• | |
| ••• | 2.360" | 26.0" | 3112 fps | ••• | |
| ••• | 2.360" | 26.0" | 3164 fps | ••• | |
| ••• | 2.360" | 26.0" | 3142 fps | ••• | |
| ••• | 2.360" | 26.0" | 3177 fps | ••• | |
| ••• | 2.360" | 26.0" | 3209 fps | ••• | |
| ••• | 2.360" | 26.0" | 3242 fps | ••• | |
| ••• | 2.360" | 26.0" | 3185 fps | ••• | |
| ••• | 2.360" | 26.0" | 3238 fps | ••• | |
| ••• | 2.360" | 26.0" | 3281 fps | ••• | |
| ••• | 2.360" | 26.0" | 3334 fps | ••• | |
| ••• | 2.360" | 26.0" | 3001 fps | ••• | |
| ••• | 2.360" | 26.0" | 3052 fps | ••• | |
| ••• | 2.360" | 26.0" | 3102 fps | ••• | |
| ••• | 2.360" | 26.0" | 3160 fps | ••• | |
| ••• | 2.360" | 26.0" | 3207 fps | ••• | |
| ••• | 2.360" | 26.0" | 3041 fps | ••• | |
| ••• | 2.360" | 26.0" | 3086 fps | ••• | |
| ••• | 2.360" | 26.0" | 3130 fps | ••• | |
| ••• | 2.360" | 26.0" | 3174 fps | ••• | |
| ••• | 2.360" | 26.0" | 3031 fps | ••• | |
| ••• | 2.360" | 26.0" | 3075 fps | ••• | |
| ••• | 2.360" | 26.0" | 3126 fps | ••• | |
| ••• | 2.360" | 26.0" | 3170 fps | ••• | |
| ••• | 2.360" | 26.0" | 3041 fps | ••• | |
| ••• | 2.360" | 26.0" | 3085 fps | ••• | |
| ••• | 2.360" | 26.0" | 3137 fps | ••• | |
| ••• | 2.252" | 24.0" | 3113 fps | ••• | |
| ••• | 2.360" | 26.0" | 3170 fps | ••• | |
| ••• | 2.360" | 26.0" | 3221 fps | ••• | |
| ••• | 2.252" | 24.0" | 3018 fps | ••• | |
| ••• | 2.360" | 26.0" | 3012 fps | ••• | |
| ••• | 2.360" | 26.0" | 3059 fps | ••• | |
| ••• | 2.360" | 26.0" | 3104 fps | ••• | |
| ••• | 2.360" | 26.0" | 3149 fps | ••• | |
| ••• | 2.360" | 26.0" | 3131 fps | ••• | |
| ••• | 2.360" | 26.0" | 3178 fps | ••• | |
| ••• | 2.360" | 26.0" | 3230 fps | ••• | |
| ••• | 2.360" | 26.0" | 3277 fps | ••• | |
| ••• | 2.360" | 26.0" | 3053 fps | ••• | |
| ••• | 2.360" | 26.0" | 3097 fps | ••• | |
| ••• | 2.360" | 26.0" | 3136 fps | ••• | |
| ••• | 2.360" | 26.0" | 3179 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.