Load data for .257 Weath. Mag. + 100gr Speer Varmint Hollow Point
Based on C.I.P., the max. allowed case length is 2.549 in / 64.74 mm, the max. cartridge length is 3.209 in / 81.51 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.549 in / 64.74 mm, the max. cartridge length is 3.209 in / 81.51 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Cartridge:.257 Weath. Mag. load data
Case Length (L3):2.549" | 64.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.369" | 9.4 mm
Case Capacity:84 gow | 5.44 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:26.0" | 660 mm
Min. Twist Rate:1:12.0
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Community Loads for .257 Weath. Mag. + 100gr Speer Varmint Hollow Point
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) |
|---|---|---|---|---|---|
| 65.0 gr | 3.140" | — | 3142 fps | ••• | |
| 67.0 gr | 3.140" | — | 3241 fps | ••• | |
| 61.0 gr | 3.140" | — | 3162 fps | ••• | |
| ••• | 3.140" | — | 3344 fps | ••• | |
| ••• | 3.140" | — | 3203 fps | ••• | |
| ••• | 3.140" | — | 3390 fps | ••• | |
| ••• | 3.140" | — | 3170 fps | ••• | |
| ••• | 3.140" | — | 3462 fps | ••• | |
| ••• | 3.140" | — | 3330 fps | ••• | |
| ••• | 3.140" | — | 3506 fps | ••• | |
| ••• | 3.140" | — | 3129 fps | ••• | |
| ••• | 3.140" | — | 3458 fps | ••• | |
| ••• | 3.140" | — | 3110 fps | ••• | |
| ••• | 3.140" | — | 3516 fps | ••• | |
| ••• | 3.140" | — | 3212 fps | ••• | |
| ••• | 3.140" | — | 3309 fps | ••• | |
| ••• | 3.140" | — | 3450 fps | ••• | |
| ••• | 3.140" | — | 3552 fps | ••• | |
| ••• | 3.140" | — | 3090 fps | ••• | |
| ••• | 3.140" | — | 3188 fps | ••• | |
| ••• | 3.140" | — | 3375 fps | ••• | |
| ••• | 3.140" | — | 3226 fps | ••• | |
| ••• | 3.140" | — | 3323 fps | ••• | |
| ••• | 3.140" | — | 3270 fps | ••• | |
| ••• | 3.140" | — | 3335 fps | ••• | |
| ••• | 3.140" | — | 3435 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.