Load data for .338 Norma Mag. + 250gr Sierra GameKing
Based on C.I.P., the max. allowed case length is 2.492 in / 63.30 mm, the max. cartridge length is 3.681 in / 93.50 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.492 in / 63.30 mm, the max. cartridge length is 3.681 in / 93.50 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Bullet:.338 | 250gr | GameKing
Cartridge:.338 Norma Mag. load data
Case Length (L3):2.490" | 63.2 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.528" | 13.4 mm
Case Capacity:105.4 gow | 6.83 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:14.0
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Community Loads for .338 Norma Mag. + 250gr 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) |
|---|---|---|---|---|---|
| 77.2 gr | 3.681" | 24.0" | 2349 fps | ••• | |
| 79.0 gr | 3.681" | 24.0" | 2400 fps | ••• | |
| 80.8 gr | 3.681" | 24.0" | 2453 fps | ••• | |
| ••• | 3.681" | 24.0" | 2504 fps | ••• | |
| ••• | 3.681" | 24.0" | 2554 fps | ••• | |
| ••• | 3.681" | 24.0" | 2604 fps | ••• | |
| ••• | 3.681" | 24.0" | 2468 fps | ••• | |
| ••• | 3.681" | 24.0" | 2537 fps | ••• | |
| ••• | 3.681" | 24.0" | 2609 fps | ••• | |
| ••• | 3.681" | 24.0" | 2388 fps | ••• | |
| ••• | 3.681" | 24.0" | 2436 fps | ••• | |
| ••• | 3.681" | 24.0" | 2486 fps | ••• | |
| ••• | 3.681" | 24.0" | 2382 fps | ••• | |
| ••• | 3.681" | 24.0" | 2431 fps | ••• | |
| ••• | 3.681" | 24.0" | 2482 fps | ••• | |
| ••• | 3.681" | 24.0" | 2532 fps | ••• | |
| ••• | 3.681" | 24.0" | 2471 fps | ••• | |
| ••• | 3.681" | 24.0" | 2527 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.