Load data for .340 Weath. Mag. + 250gr Sierra GameKing
Based on C.I.P., the max. allowed case length is 2.825 in / 71.76 mm, the max. cartridge length is 3.675 in / 93.35 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Based on C.I.P., the max. allowed case length is 2.825 in / 71.76 mm, the max. cartridge length is 3.675 in / 93.35 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Bullet:.338 | 250gr | GameKing
Cartridge:.340 Weath. Mag. load data
Case Length (L3):2.825" | 71.8 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.640" | 16.3 mm
Case Capacity:100 gow | 6.48 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:1:14.0
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Community Loads for .340 Weath. 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) |
|---|---|---|---|---|---|
| 72.1 gr | 3.675" | 26.0" | 2430 fps | ••• | |
| 74.8 gr | 3.675" | 26.0" | 2514 fps | ••• | |
| 77.6 gr | 3.675" | 26.0" | 2599 fps | ••• | |
| ••• | 3.675" | 26.0" | 2680 fps | ••• | |
| ••• | 3.675" | 26.0" | 2761 fps | ••• | |
| ••• | 3.675" | 26.0" | 2562 fps | ••• | |
| ••• | 3.675" | 26.0" | 2700 fps | ••• | |
| ••• | 3.675" | 26.0" | 2836 fps | ••• | |
| ••• | 3.675" | 26.0" | 2592 fps | ••• | |
| ••• | 3.675" | 26.0" | 2670 fps | ••• | |
| ••• | 3.675" | 26.0" | 2746 fps | ••• | |
| ••• | 3.675" | 26.0" | 2823 fps | ••• | |
| ••• | 3.675" | 26.0" | 2544 fps | ••• | |
| ••• | 3.675" | 26.0" | 2622 fps | ••• | |
| ••• | 3.675" | 26.0" | 2700 fps | ••• | |
| ••• | 3.675" | 26.0" | 2776 fps | ••• | |
| ••• | 3.675" | 26.0" | 2606 fps | ••• | |
| ••• | 3.675" | 26.0" | 2695 fps | ••• | |
| ••• | 3.675" | 26.0" | 2781 fps | ••• | |
| ••• | 3.675" | 26.0" | 2867 fps | ••• | |
| ••• | 3.675" | 26.0" | 2623 fps | ••• | |
| ••• | 3.675" | 26.0" | 2697 fps | ••• | |
| ••• | 3.675" | 26.0" | 2623 fps | ••• | |
| ••• | 3.675" | 26.0" | 2707 fps | ••• | |
| ••• | 3.675" | 26.0" | 2792 fps | ••• | |
| ••• | 3.675" | 26.0" | 2518 fps | ••• | |
| ••• | 3.675" | 26.0" | 2603 fps | ••• | |
| ••• | 3.675" | 26.0" | 2687 fps | ••• | |
| ••• | 3.675" | 26.0" | 2771 fps | ••• | |
| ••• | 3.675" | 26.0" | 2502 fps | ••• | |
| ••• | 3.675" | 26.0" | 2578 fps | ••• | |
| ••• | 3.675" | 26.0" | 2653 fps | ••• | |
| ••• | 3.675" | 26.0" | 2724 fps | ••• | |
| ••• | 3.675" | 26.0" | 2652 fps | ••• | |
| ••• | 3.675" | 26.0" | 2725 fps | ••• | |
| ••• | 3.675" | 26.0" | 2486 fps | ••• | |
| ••• | 3.675" | 26.0" | 2579 fps | ••• | |
| ••• | 3.675" | 26.0" | 2669 fps | ••• | |
| ••• | 3.675" | 26.0" | 2756 fps | ••• | |
| ••• | 3.675" | 26.0" | 2584 fps | ••• | |
| ••• | 3.675" | 26.0" | 2654 fps | ••• | |
| ••• | 3.675" | 26.0" | 2720 fps | ••• | |
| ••• | 3.675" | 26.0" | 2553 fps | ••• | |
| ••• | 3.675" | 26.0" | 2607 fps | ••• | |
| ••• | 3.675" | 26.0" | 2634 fps | ••• | |
| ••• | 3.675" | 26.0" | 2696 fps | ••• | |
| ••• | 3.675" | 26.0" | 2715 fps | ••• | |
| ••• | 3.675" | 26.0" | 2783 fps | ••• | |
| ••• | 3.675" | 26.0" | 2795 fps | ••• | |
| ••• | 3.675" | 26.0" | 2871 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.