Load data for .300 Win. Mag. + 175gr Sierra MatchKing
Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 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 2.620 in / 66.55 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:.308 | 175gr | MatchKing
Cartridge:.300 Win. Mag. load data
Case Length (L3):2.620" | 66.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.521" | 13.2 mm
Case Capacity:90.5 gow | 5.86 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):62,366 psi | 4,300 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:13.5
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Community Loads for .300 Win. Mag. + 175gr Sierra MatchKing
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) |
|---|---|---|---|---|---|
| 60.6 gr | 3.340" | 24.0" | 2701 fps | ••• | |
| 63.2 gr | 3.340" | 24.0" | 2800 fps | ••• | |
| 67.9 gr | 3.340" | 24.0" | 2671 fps | ••• | |
| ••• | 3.340" | 24.0" | 2758 fps | ••• | |
| ••• | 3.340" | 24.0" | 2667 fps | ••• | |
| ••• | 3.340" | 24.0" | 2662 fps | ••• | |
| ••• | 3.340" | 24.0" | 2742 fps | ••• | |
| ••• | 3.340" | 24.0" | 2819 fps | ••• | |
| ••• | 3.340" | 24.0" | 2904 fps | ••• | |
| ••• | 3.340" | 24.0" | 2636 fps | ••• | |
| ••• | 3.340" | 24.0" | 2706 fps | ••• | |
| ••• | 3.340" | 24.0" | 2549 fps | ••• | |
| ••• | 3.340" | 24.0" | 2657 fps | ••• | |
| ••• | 3.340" | 24.0" | 2766 fps | ••• | |
| ••• | 3.340" | 24.0" | 2729 fps | ••• | |
| ••• | 3.340" | 24.0" | 2809 fps | ••• | |
| ••• | 3.340" | 24.0" | 2890 fps | ••• | |
| ••• | 3.340" | 24.0" | 2708 fps | ••• | |
| ••• | 3.340" | 24.0" | 2793 fps | ••• | |
| ••• | 3.340" | 24.0" | 2583 fps | ••• | |
| ••• | 3.340" | 24.0" | 2673 fps | ••• | |
| ••• | 3.340" | 24.0" | 2759 fps | ••• | |
| ••• | 3.340" | 24.0" | 2650 fps | ••• | |
| ••• | 3.340" | 24.0" | 2740 fps | ••• | |
| ••• | 3.340" | 24.0" | 2768 fps | ••• | |
| ••• | 3.340" | 24.0" | 2843 fps | ••• | |
| ••• | 3.340" | 24.0" | 2922 fps | ••• | |
| ••• | 3.340" | 24.0" | 2582 fps | ••• | |
| ••• | 3.340" | 24.0" | 2665 fps | ••• | |
| ••• | 3.340" | 24.0" | 2751 fps | ••• | |
| ••• | 3.340" | 24.0" | 2692 fps | ••• | |
| ••• | 3.340" | 24.0" | 2774 fps | ••• | |
| ••• | 3.340" | 24.0" | 2857 fps | ••• | |
| ••• | 3.340" | 24.0" | 2611 fps | ••• | |
| ••• | 3.340" | 24.0" | 2689 fps | ••• | |
| ••• | 3.340" | 24.0" | 2776 fps | ••• | |
| ••• | 3.340" | 24.0" | 2651 fps | ••• | |
| ••• | 3.340" | 24.0" | 2724 fps | ••• | |
| ••• | 3.340" | 24.0" | 2800 fps | ••• | |
| ••• | 3.340" | 24.0" | 2672 fps | ••• | |
| ••• | 3.340" | 24.0" | 2782 fps | ••• | |
| ••• | 3.339" | 24.5" | 2702 fps | ••• | |
| ••• | 3.339" | 24.5" | 2677 fps | ••• | |
| ••• | 3.339" | 24.5" | 2589 fps | ••• | |
| ••• | 3.339" | 24.5" | 2608 fps | ••• | |
| ••• | 3.340" | 24.0" | 2671 fps | ••• | |
| ••• | 3.339" | 24.5" | 2685 fps | ••• | |
| ••• | 3.340" | 24.0" | 2743 fps | ••• | |
| ••• | 3.340" | 24.0" | 2823 fps | ••• | |
| ••• | 3.339" | 24.5" | 2614 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.