Load data for .25 WSSM + 100gr 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 | 100gr | GameKing
Cartridge:.25 WSSM load data
Case Length (L3):1.670" | 42.4 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.387" | 9.8 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:1:11.5
Get PRO license to unlock all data and calculators
Community Loads for .25 WSSM + 100gr 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) |
|---|---|---|---|---|---|
| 40.1 gr | 2.360" | 26.0" | 3019 fps | ••• | |
| 38.8 gr | 2.360" | 26.0" | 2947 fps | ••• | |
| 39.6 gr | 2.360" | 26.0" | 2997 fps | ••• | |
| ••• | 2.360" | 26.0" | 3040 fps | ••• | |
| ••• | 2.360" | 26.0" | 3089 fps | ••• | |
| ••• | 2.360" | 26.0" | 2906 fps | ••• | |
| ••• | 2.360" | 26.0" | 2989 fps | ••• | |
| ••• | 2.360" | 26.0" | 3036 fps | ••• | |
| ••• | 2.360" | 26.0" | 3082 fps | ••• | |
| ••• | 2.360" | 26.0" | 3118 fps | ••• | |
| ••• | 2.360" | 26.0" | 2968 fps | ••• | |
| ••• | 2.360" | 26.0" | 3068 fps | ••• | |
| ••• | 2.360" | 26.0" | 3124 fps | ••• | |
| ••• | 2.360" | 26.0" | 3174 fps | ••• | |
| ••• | 2.360" | 26.0" | 3222 fps | ••• | |
| ••• | 2.360" | 26.0" | 2949 fps | ••• | |
| ••• | 2.360" | 26.0" | 2993 fps | ••• | |
| ••• | 2.360" | 26.0" | 3035 fps | ••• | |
| ••• | 2.360" | 26.0" | 3077 fps | ••• | |
| ••• | 2.360" | 26.0" | 2867 fps | ••• | |
| ••• | 2.360" | 26.0" | 2948 fps | ••• | |
| ••• | 2.360" | 26.0" | 2990 fps | ••• | |
| ••• | 2.360" | 26.0" | 3034 fps | ••• | |
| ••• | 2.360" | 26.0" | 3070 fps | ••• | |
| ••• | 2.360" | 26.0" | 2835 fps | ••• | |
| ••• | 2.360" | 26.0" | 2933 fps | ••• | |
| ••• | 2.360" | 26.0" | 2982 fps | ••• | |
| ••• | 2.360" | 26.0" | 3032 fps | ••• | |
| ••• | 2.360" | 26.0" | 3080 fps | ••• | |
| ••• | 2.360" | 26.0" | 2929 fps | ••• | |
| ••• | 2.360" | 26.0" | 3028 fps | ••• | |
| ••• | 2.360" | 26.0" | 3076 fps | ••• | |
| ••• | 2.360" | 26.0" | 3126 fps | ••• | |
| ••• | 2.360" | 26.0" | 3175 fps | ••• | |
| ••• | 2.360" | 26.0" | 2931 fps | ••• | |
| ••• | 2.360" | 26.0" | 2975 fps | ••• | |
| ••• | 2.360" | 26.0" | 3019 fps | ••• | |
| ••• | 2.360" | 26.0" | 3068 fps | ••• | |
| ••• | 2.360" | 26.0" | 2836 fps | ••• | |
| ••• | 2.360" | 26.0" | 2950 fps | ••• | |
| ••• | 2.360" | 26.0" | 3007 fps | ••• | |
| ••• | 2.360" | 26.0" | 3064 fps | ••• | |
| ••• | 2.360" | 26.0" | 2967 fps | ••• | |
| ••• | 2.360" | 26.0" | 3024 fps | ••• | |
| ••• | 2.360" | 26.0" | 3082 fps | ••• | |
| ••• | 2.360" | 26.0" | 3145 fps | ••• | |
| ••• | 2.360" | 26.0" | 2825 fps | ••• | |
| ••• | 2.360" | 26.0" | 2931 fps | ••• | |
| ••• | 2.360" | 26.0" | 2984 fps | ••• | |
| ••• | 2.360" | 26.0" | 3037 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.