Load data for .257 Roberts + 100gr Nosler Partition
379 suitable loads across 70 powder(s) for cartridge .257 Roberts with 100gr Nosler Partition bullet.
The most recommended powders for this combination are Alliant Reloder-16, IMR 4350 and Vihtavuori N540.
Based on C.I.P., the max. allowed case length is 2.233 in / 56.72 mm, the max. cartridge length is 2.775 in / 70.49 mm, and the max. allowed pressure is 51,488 PSI / 3,550 bar.
Based on C.I.P., the max. allowed case length is 2.233 in / 56.72 mm, the max. cartridge length is 2.775 in / 70.49 mm, and the max. allowed pressure is 51,488 PSI / 3,550 bar.
Load Specifications
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Community Loads for .257 Roberts + 100gr 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) |
|---|---|---|---|---|---|
| 44.0 gr | 2.750" | 24.0" | 2784 fps | ••• | |
| 46.0 gr | 2.750" | 24.0" | 2913 fps | ••• | |
| 48.0 gr | 2.750" | 24.0" | 3041 fps | ••• | |
| ••• | 2.750" | 24.0" | 2869 fps | ••• | |
| ••• | 2.775" | 26.0" | 2959 fps | ••• | |
| ••• | 2.750" | 24.0" | 2663 fps | ••• | |
| ••• | 2.750" | 24.0" | 2791 fps | ••• | |
| ••• | 2.750" | 24.0" | 2923 fps | ••• | |
| ••• | 2.750" | 24.0" | 2931 fps | ••• | |
| ••• | 2.750" | 24.0" | 2627 fps | ••• | |
| ••• | 2.750" | 24.0" | 2749 fps | ••• | |
| ••• | 2.750" | 24.0" | 2872 fps | ••• | |
| ••• | 2.750" | 24.0" | 2760 fps | ••• | |
| ••• | 2.750" | 24.0" | 2883 fps | ••• | |
| ••• | 2.750" | 24.0" | 3007 fps | ••• | |
| ••• | 2.733" | 24.0" | 3009 fps | ••• | |
| ••• | 2.733" | 24.0" | 3061 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.