Load data for .338 Win Mag. + 250gr Sierra GameKing
Based on C.I.P., the max. allowed case length is 2.500 in / 63.50 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on C.I.P., the max. allowed case length is 2.500 in / 63.50 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
ImperialMetric
Bullet:.338 | 250gr | GameKing
Cartridge:.338 Win Mag. load data
Case Length (L3):2.500" | 63.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.596" | 15.1 mm
Case Capacity:86 gow | 5.57 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):62,366 psi | 4,300 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:14.0
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Community Loads for .338 Win 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) |
|---|---|---|---|---|---|
| 60.2 gr | 3.340" | 24.0" | 2407 fps | ••• | |
| 61.7 gr | 3.340" | 24.0" | 2460 fps | ••• | |
| 63.1 gr | 3.340" | 24.0" | 2510 fps | ••• | |
| ••• | 3.340" | 24.0" | 2560 fps | ••• | |
| ••• | 3.340" | 24.0" | 2443 fps | ••• | |
| ••• | 3.340" | 24.0" | 2495 fps | ••• | |
| ••• | 3.340" | 24.0" | 2544 fps | ••• | |
| ••• | 3.340" | 24.0" | 2598 fps | ••• | |
| ••• | 3.340" | 24.0" | 2386 fps | ••• | |
| ••• | 3.340" | 24.0" | 2444 fps | ••• | |
| ••• | 3.340" | 24.0" | 2499 fps | ••• | |
| ••• | 3.340" | 24.0" | 2554 fps | ••• | |
| ••• | 3.340" | 24.0" | 2514 fps | ••• | |
| ••• | 3.340" | 24.0" | 2573 fps | ••• | |
| ••• | 3.340" | 24.0" | 2356 fps | ••• | |
| ••• | 3.340" | 24.0" | 2403 fps | ••• | |
| ••• | 3.340" | 24.0" | 2452 fps | ••• | |
| ••• | 3.340" | 24.0" | 2499 fps | ••• | |
| ••• | 3.340" | 24.0" | 2548 fps | ••• | |
| ••• | 3.340" | 24.0" | 2441 fps | ••• | |
| ••• | 3.340" | 24.0" | 2501 fps | ••• | |
| ••• | 3.340" | 24.0" | 2564 fps | ••• | |
| ••• | 3.340" | 24.0" | 2451 fps | ••• | |
| ••• | 3.340" | 24.0" | 2507 fps | ••• | |
| ••• | 3.340" | 24.0" | 2567 fps | ••• | |
| ••• | 3.340" | 24.0" | 2627 fps | ••• | |
| ••• | 3.340" | 24.0" | 2450 fps | ••• | |
| ••• | 3.340" | 24.0" | 2497 fps | ••• | |
| ••• | 3.340" | 24.0" | 2545 fps | ••• | |
| ••• | 3.340" | 24.0" | 2557 fps | ••• | |
| ••• | 3.340" | 24.0" | 2639 fps | ••• | |
| ••• | 3.340" | 24.0" | 2319 fps | ••• | |
| ••• | 3.340" | 24.0" | 2368 fps | ••• | |
| ••• | 3.340" | 24.0" | 2414 fps | ••• | |
| ••• | 3.340" | 24.0" | 2457 fps | ••• | |
| ••• | 3.340" | 24.0" | 2394 fps | ••• | |
| ••• | 3.340" | 24.0" | 2440 fps | ••• | |
| ••• | 3.340" | 24.0" | 2491 fps | ••• | |
| ••• | 3.340" | 24.0" | 2434 fps | ••• | |
| ••• | 3.340" | 24.0" | 2470 fps | ••• | |
| ••• | 3.340" | 24.0" | 2515 fps | ••• | |
| ••• | 3.340" | 24.0" | 2574 fps | ••• | |
| ••• | 3.339" | 24.5" | 2590 fps | ••• | |
| ••• | 3.339" | 24.5" | 2537 fps | ••• | |
| ••• | 3.340" | 24.0" | 2327 fps | ••• | |
| ••• | 3.340" | 24.0" | 2377 fps | ••• | |
| ••• | 3.340" | 24.0" | 2425 fps | ••• | |
| ••• | 3.339" | 24.5" | 2459 fps | ••• | |
| ••• | 3.340" | 24.0" | 2475 fps | ••• | |
| ••• | 3.340" | 24.0" | 2528 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.