Load data for .338-378 Weath. Mag. + 215gr Sierra GameKing
Based on C.I.P., the max. allowed case length is 2.913 in / 73.99 mm, the max. cartridge length is 3.763 in / 95.58 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Based on C.I.P., the max. allowed case length is 2.913 in / 73.99 mm, the max. cartridge length is 3.763 in / 95.58 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Bullet:.338 | 215gr | GameKing
Cartridge:.338-378 Weath. Mag. load data
Case Length (L3):2.910" | 73.9 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.486" | 12.3 mm
Case Capacity:137 gow | 8.88 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:1:15.5
Get PRO license to unlock all data and calculators
Community Loads for .338-378 Weath. Mag. + 215gr 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) |
|---|---|---|---|---|---|
| 92.6 gr | 3.750" | 24.0" | 2665 fps | ••• | |
| 94.0 gr | 3.750" | 24.0" | 2698 fps | ••• | |
| 95.9 gr | 3.750" | 24.0" | 2743 fps | ••• | |
| ••• | 3.750" | 24.0" | 2745 fps | ••• | |
| ••• | 3.750" | 24.0" | 2787 fps | ••• | |
| ••• | 3.750" | 24.0" | 2809 fps | ••• | |
| ••• | 3.750" | 24.0" | 2716 fps | ••• | |
| ••• | 3.750" | 24.0" | 2764 fps | ••• | |
| ••• | 3.750" | 24.0" | 2809 fps | ••• | |
| ••• | 3.750" | 24.0" | 2813 fps | ••• | |
| ••• | 3.750" | 24.0" | 2860 fps | ••• | |
| ••• | 3.750" | 24.0" | 2880 fps | ••• | |
| ••• | 3.750" | 24.0" | 2886 fps | ••• | |
| ••• | 3.750" | 24.0" | 2958 fps | ••• | |
| ••• | 3.750" | 24.0" | 2989 fps | ••• | |
| ••• | 3.750" | 24.0" | 3018 fps | ••• | |
| ••• | 3.750" | 24.0" | 2731 fps | ••• | |
| ••• | 3.750" | 24.0" | 2760 fps | ••• | |
| ••• | 3.750" | 24.0" | 2864 fps | ••• | |
| ••• | 3.750" | 24.0" | 2912 fps | ••• | |
| ••• | 3.750" | 24.0" | 2691 fps | ••• | |
| ••• | 3.750" | 24.0" | 2712 fps | ••• | |
| ••• | 3.750" | 24.0" | 2752 fps | ••• | |
| ••• | 3.750" | 24.0" | 2800 fps | ••• | |
| ••• | 3.750" | 24.0" | 2808 fps | ••• | |
| ••• | 3.750" | 24.0" | 2893 fps | ••• | |
| ••• | 3.750" | 24.0" | 2935 fps | ••• | |
| ••• | 3.750" | 24.0" | 2588 fps | ••• | |
| ••• | 3.750" | 24.0" | 2621 fps | ••• | |
| ••• | 3.750" | 24.0" | 2636 fps | ••• | |
| ••• | 3.750" | 24.0" | 2683 fps | ••• | |
| ••• | 3.750" | 24.0" | 2697 fps | ••• | |
| ••• | 3.750" | 24.0" | 2727 fps | ••• | |
| ••• | 3.750" | 24.0" | 2768 fps | ••• | |
| ••• | 3.750" | 24.0" | 2804 fps | ••• | |
| ••• | 3.750" | 24.0" | 2823 fps | ••• | |
| ••• | 3.750" | 24.0" | 2837 fps | ••• | |
| ••• | 3.750" | 24.0" | 2785 fps | ••• | |
| ••• | 3.750" | 24.0" | 2793 fps | ••• | |
| ••• | 3.750" | 24.0" | 2833 fps | ••• | |
| ••• | 3.750" | 24.0" | 2857 fps | ••• | |
| ••• | 3.750" | 24.0" | 2883 fps | ••• | |
| ••• | 3.750" | 24.0" | 2922 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.