Load data for .25 WSSM + 120gr Nosler Partition
The most recommended powders for this combination are IMR 4350.
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 | 120gr | Partition
Cartridge:.25 WSSM load data
Case Length (L3):1.670" | 42.4 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.495" | 12.6 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:1:10.0
Get PRO license to unlock all data and calculators
Community Loads for .25 WSSM + 120gr Nosler Partition
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) |
|---|---|---|---|---|---|
| 39.0 gr | 2.350" | 24.0" | 2763 fps | ••• | |
| 41.0 gr | 2.350" | 24.0" | 2882 fps | ••• | |
| 41.0 gr | 2.350" | 24.0" | 2757 fps | ••• | |
| ••• | 2.350" | 24.0" | 2881 fps | ••• | |
| ••• | 2.350" | 24.0" | 3002 fps | ••• | |
| ••• | 2.350" | 24.0" | 2815 fps | ••• | |
| ••• | 2.350" | 24.0" | 2936 fps | ••• | |
| ••• | 2.350" | 24.0" | 2708 fps | ••• | |
| ••• | 2.350" | 24.0" | 2836 fps | ••• | |
| ••• | 2.350" | 24.0" | 2965 fps | ••• | |
| ••• | 2.350" | 24.0" | 2688 fps | ••• | |
| ••• | 2.350" | 24.0" | 2804 fps | ••• | |
| ••• | 2.350" | 24.0" | 2662 fps | ••• | |
| ••• | 2.350" | 24.0" | 2781 fps | ••• | |
| ••• | 2.350" | 24.0" | 2900 fps | ••• | |
| ••• | 2.350" | 24.0" | 2723 fps | ••• | |
| ••• | 2.350" | 24.0" | 2838 fps | ••• | |
| ••• | 2.350" | 24.0" | 2952 fps | ••• | |
| ••• | 2.350" | 24.0" | 2857 fps | ••• | |
| ••• | 2.350" | 24.0" | 2976 fps | ••• | |
| ••• | 2.350" | 24.0" | 2757 fps | ••• | |
| ••• | 2.350" | 24.0" | 2881 fps | ••• | |
| ••• | 2.350" | 24.0" | 3002 fps | ••• | |
| ••• | 2.350" | 24.0" | 2760 fps | ••• | |
| ••• | 2.350" | 24.0" | 2894 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.