Load data for .300 Rem. SA Ultra Mag. + 180gr Sierra GameKing
Based on SAAMI, the max. allowed case length is 2.015 in / 51.18 mm, the max. cartridge length is 2.825 in / 71.75 mm, and the max. allowed pressure is 65,000 PSI / 4,482 bar.

Based on SAAMI, the max. allowed case length is 2.015 in / 51.18 mm, the max. cartridge length is 2.825 in / 71.75 mm, and the max. allowed pressure is 65,000 PSI / 4,482 bar.

Load Specifications
ImperialMetric
Bullet:.308 | 180gr | GameKing
Cartridge:.300 Rem. SA Ultra Mag. load data
Case Length (L3):2.003" | 50.9 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.558" | 14.2 mm
Case Capacity:74 gow | 4.80 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (SAAMI):65,000 psi | 4,482 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:12.5
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Community Loads for .300 Rem. SA Ultra Mag. + 180gr 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) |
|---|---|---|---|---|---|
| 49.9 gr | 2.825" | 24.0" | 2599 fps | ••• | |
| 52.4 gr | 2.825" | 24.0" | 2704 fps | ••• | |
| 53.5 gr | 2.825" | 24.0" | 2749 fps | ••• | |
| ••• | 2.825" | 24.0" | 2790 fps | ••• | |
| ••• | 2.825" | 24.0" | 2554 fps | ••• | |
| ••• | 2.825" | 24.0" | 2639 fps | ••• | |
| ••• | 2.825" | 24.0" | 2731 fps | ••• | |
| ••• | 2.825" | 24.0" | 2773 fps | ••• | |
| ••• | 2.825" | 24.0" | 2820 fps | ••• | |
| ••• | 2.825" | 24.0" | 2867 fps | ••• | |
| ••• | 2.825" | 24.0" | 2488 fps | ••• | |
| ••• | 2.825" | 24.0" | 2576 fps | ••• | |
| ••• | 2.825" | 24.0" | 2658 fps | ••• | |
| ••• | 2.825" | 24.0" | 2701 fps | ••• | |
| ••• | 2.825" | 24.0" | 2736 fps | ••• | |
| ••• | 2.825" | 24.0" | 2773 fps | ••• | |
| ••• | 2.825" | 24.0" | 2623 fps | ••• | |
| ••• | 2.825" | 24.0" | 2734 fps | ••• | |
| ••• | 2.825" | 24.0" | 2780 fps | ••• | |
| ••• | 2.825" | 24.0" | 2827 fps | ••• | |
| ••• | 2.825" | 24.0" | 2874 fps | ••• | |
| ••• | 2.825" | 24.0" | 2530 fps | ••• | |
| ••• | 2.825" | 24.0" | 2627 fps | ••• | |
| ••• | 2.825" | 24.0" | 2677 fps | ••• | |
| ••• | 2.825" | 24.0" | 2721 fps | ••• | |
| ••• | 2.825" | 24.0" | 2658 fps | ••• | |
| ••• | 2.825" | 24.0" | 2712 fps | ••• | |
| ••• | 2.825" | 24.0" | 2683 fps | ••• | |
| ••• | 2.825" | 24.0" | 2730 fps | ••• | |
| ••• | 2.825" | 24.0" | 2778 fps | ••• | |
| ••• | 2.825" | 24.0" | 2564 fps | ••• | |
| ••• | 2.825" | 24.0" | 2610 fps | ••• | |
| ••• | 2.825" | 24.0" | 2409 fps | ••• | |
| ••• | 2.825" | 24.0" | 2498 fps | ••• | |
| ••• | 2.825" | 24.0" | 2586 fps | ••• | |
| ••• | 2.825" | 24.0" | 2668 fps | ••• | |
| ••• | 2.825" | 24.0" | 2714 fps | ••• | |
| ••• | 2.825" | 24.0" | 2756 fps | ••• | |
| ••• | 2.825" | 24.0" | 2609 fps | ••• | |
| ••• | 2.825" | 24.0" | 2698 fps | ••• | |
| ••• | 2.825" | 24.0" | 2783 fps | ••• | |
| ••• | 2.825" | 24.0" | 2829 fps | ••• | |
| ••• | 2.825" | 24.0" | 2874 fps | ••• | |
| ••• | 2.825" | 24.0" | 2602 fps | ••• | |
| ••• | 2.825" | 24.0" | 2705 fps | ••• | |
| ••• | 2.825" | 24.0" | 2753 fps | ••• | |
| ••• | 2.825" | 24.0" | 2792 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.