Load data for .25 WSSM + 87gr Speer TNT
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 | 87gr | TNT
Cartridge:.25 WSSM load data
Case Length (L3):1.670" | 42.4 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.240" | 6.1 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:1:12.0
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Community Loads for .25 WSSM + 87gr Speer TNT
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) |
|---|---|---|---|---|---|
| 48.0 gr | 2.350" | — | 3281 fps | ••• | |
| 50.0 gr | 2.350" | — | 3421 fps | ••• | |
| 39.0 gr | 2.350" | — | 3294 fps | ••• | |
| ••• | 2.350" | — | 3129 fps | ••• | |
| ••• | 2.350" | — | 3387 fps | ••• | |
| ••• | 2.350" | — | 3088 fps | ••• | |
| ••• | 2.350" | — | 3295 fps | ••• | |
| ••• | 2.350" | — | 3184 fps | ••• | |
| ••• | 2.350" | — | 3455 fps | ••• | |
| ••• | 2.350" | — | 3019 fps | ••• | |
| ••• | 2.350" | — | 3276 fps | ••• | |
| ••• | 2.350" | — | 3089 fps | ••• | |
| ••• | 2.350" | — | 3348 fps | ••• | |
| ••• | 2.350" | — | 3068 fps | ••• | |
| ••• | 2.350" | — | 3329 fps | ••• | |
| ••• | 2.350" | — | 3244 fps | ••• | |
| ••• | 2.350" | — | 2897 fps | ••• | |
| ••• | 2.350" | — | 3181 fps | ••• | |
| ••• | 2.350" | — | 3320 fps | ••• | |
| ••• | 2.350" | — | 3455 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.