Load data for .257 Weath. Mag. + 90gr Sierra Blitzking
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
Bullet:.257 | 90gr | Blitzking
Cartridge:.257 Weath. Mag. load data
Case Length (L3):2.549" | 64.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.418" | 10.6 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:1:9.5
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Community Loads for .257 Weath. Mag. + 90gr Sierra Blitzking
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) |
|---|---|---|---|---|---|
| 60.4 gr | 3.150" | 26.0" | 3386 fps | ••• | |
| 67.4 gr | 3.150" | 26.0" | 3322 fps | ••• | |
| 58.5 gr | 3.250" | 24.0" | 3272 fps | ••• | |
| ••• | 3.250" | 24.0" | 3393 fps | ••• | |
| ••• | 3.250" | 24.0" | 3491 fps | ••• | |
| ••• | 3.250" | 24.0" | 3384 fps | ••• | |
| ••• | 3.250" | 24.0" | 3222 fps | ••• | |
| ••• | 3.250" | 24.0" | 3332 fps | ••• | |
| ••• | 3.250" | 24.0" | 3429 fps | ••• | |
| ••• | 3.250" | 24.0" | 3515 fps | ••• | |
| ••• | 3.250" | 24.0" | 3585 fps | ••• | |
| ••• | 3.250" | 24.0" | 3252 fps | ••• | |
| ••• | 3.250" | 24.0" | 3325 fps | ••• | |
| ••• | 3.250" | 24.0" | 3404 fps | ••• | |
| ••• | 3.250" | 24.0" | 3296 fps | ••• | |
| ••• | 3.250" | 24.0" | 3375 fps | ••• | |
| ••• | 3.250" | 24.0" | 3448 fps | ••• | |
| ••• | 3.250" | 24.0" | 3515 fps | ••• | |
| ••• | 3.250" | 24.0" | 3299 fps | ••• | |
| ••• | 3.250" | 24.0" | 3381 fps | ••• | |
| ••• | 3.250" | 24.0" | 3464 fps | ••• | |
| ••• | 3.250" | 24.0" | 3355 fps | ••• | |
| ••• | 3.250" | 24.0" | 3268 fps | ••• | |
| ••• | 3.250" | 24.0" | 3365 fps | ••• | |
| ••• | 3.250" | 24.0" | 3468 fps | ••• | |
| ••• | 3.250" | 24.0" | 3088 fps | ••• | |
| ••• | 3.250" | 24.0" | 3185 fps | ••• | |
| ••• | 3.250" | 24.0" | 3268 fps | ••• | |
| ••• | 3.250" | 24.0" | 3040 fps | ••• | |
| ••• | 3.250" | 24.0" | 3074 fps | ••• | |
| ••• | 3.250" | 24.0" | 3116 fps | ••• | |
| ••• | 3.250" | 24.0" | 3290 fps | ••• | |
| ••• | 3.250" | 24.0" | 3262 fps | ••• | |
| ••• | 3.250" | 24.0" | 3374 fps | ••• | |
| ••• | 3.250" | 24.0" | 3471 fps | ••• | |
| ••• | 3.250" | 24.0" | 3548 fps | ••• | |
| ••• | 3.250" | 24.0" | 3148 fps | ••• | |
| ••• | 3.250" | 24.0" | 3225 fps | ••• | |
| ••• | 3.250" | 24.0" | 3305 fps | ••• | |
| ••• | 3.250" | 24.0" | 3379 fps | ••• | |
| ••• | 3.150" | 26.0" | 3120 fps | ••• | |
| ••• | 3.150" | 26.0" | 3107 fps | ••• | |
| ••• | 3.250" | 24.0" | 3196 fps | ••• | |
| ••• | 3.250" | 24.0" | 3275 fps | ••• | |
| ••• | 3.250" | 24.0" | 3357 fps | ••• | |
| ••• | 3.250" | 24.0" | 3438 fps | ••• | |
| ••• | 3.250" | 24.0" | 3260 fps | ••• | |
| ••• | 3.250" | 24.0" | 3332 fps | ••• | |
| ••• | 3.250" | 24.0" | 3407 fps | ••• | |
| ••• | 3.250" | 24.0" | 3472 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.