Load data for .257 Ackley Improved + 90gr Sierra GameKing
288 suitable loads across 56 powder(s) for cartridge .257 Ackley Improved with 90gr Sierra GameKing bullet.
The most recommended powders for this combination are Alliant Reloder-16, Somchem S365 and Norma URP.
Based on Wildcat, 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 48,200 PSI / 3,323 bar.
Based on Wildcat, 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 48,200 PSI / 3,323 bar.
Load Specifications
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Community Loads for .257 Ackley Improved + 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) |
|---|---|---|---|---|---|
| 46.6 gr | 2.835" | 24.0" | 3043 fps | ••• | |
| 47.7 gr | 2.835" | 24.0" | 3043 fps | ••• | |
| 47.9 gr | 2.790" | 26.0" | 3137 fps | ••• | |
| ••• | 2.790" | 26.0" | 3214 fps | ••• | |
| ••• | 2.790" | 26.0" | 3199 fps | ••• | |
| ••• | 2.790" | 26.0" | 3199 fps | ••• | |
| ••• | 2.790" | 26.0" | 3162 fps | ••• | |
| ••• | 2.790" | 26.0" | 3044 fps | ••• | |
| ••• | 2.790" | 26.0" | 3120 fps | ••• | |
| ••• | 2.790" | 26.0" | 3115 fps | ••• | |
| ••• | 2.790" | 26.0" | 3198 fps | ••• | |
| ••• | 2.790" | 26.0" | 3237 fps | ••• | |
| ••• | 2.790" | 26.0" | 2958 fps | ••• | |
| ••• | 2.790" | 26.0" | 3049 fps | ••• | |
| ••• | 2.790" | 26.0" | 3143 fps | ••• | |
| ••• | 2.790" | 26.0" | 3234 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.