Load Specifications
Load data in caliber .300 WSM with .308 | 168gr | Sierra MatchKing bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 55,724 psi | 87% | 2779 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,230 psi | 87% | 2812 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,795 psi | 86% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,679 psi | 86% | 2818 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,701 psi | 72% | 2772 fps | 97.6% |
| Accurate 4064 | <<locked>> | 88% | 55,332 psi | 87% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,274 psi | 87% | 2953 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,071 psi | 86% | 2890 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,970 psi | 88% | 2890 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 2930 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,363 psi | 90% | 2887 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,042 psi | 86% | 2808 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,882 psi | 86% | 3012 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,362 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,971 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,289 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,940 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2913 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,323 psi | 68% | 2802 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 2982 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,911 psi | 86% | 2907 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 57,363 psi | 90% | 2933 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,840 psi | 89% | 2904 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,347 psi | 87% | 2818 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,232 psi | 90% | 2920 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,290 psi | 90% | 2864 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,447 psi | 85% | 2894 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 55,767 psi | 87% | 2972 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 96% | 56,159 psi | 88% | 2933 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 84% | 55,637 psi | 87% | 2900 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2930 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,651 psi | 87% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,723 psi | 86% | 2986 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 56% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,564 psi | 87% | 2884 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,331 psi | 85% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,984 psi | 86% | 2864 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,305 psi | 90% | 2887 fps | 98.6% |
| IMR 4350 | <<locked>> | 98% | 57,348 psi | 90% | 2933 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,230 psi | 87% | 2881 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2900 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 54,708 psi | 86% | 2913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,363 psi | 90% | 2887 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,085 psi | 86% | 2864 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,464 psi | 90% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,637 psi | 87% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,839 psi | 86% | 2877 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 55,869 psi | 88% | 2913 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 57,305 psi | 90% | 2884 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,476 psi | 85% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,188 psi | 88% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,389 psi | 85% | 2927 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 48,602 psi | 76% | 2933 fps | 97.3% |
| Norma URP | <<locked>> | 96% | 54,143 psi | 85% | 2936 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 56,797 psi | 89% | 2949 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,550 psi | 89% | 2989 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 57,595 psi | 90% | 2913 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,348 psi | 90% | 2927 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 57% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,331 psi | 85% | 2871 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,696 psi | 90% | 3005 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,450 psi | 90% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,042 psi | 86% | 2976 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,288 psi | 85% | 3005 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 54,766 psi | 86% | 2815 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,638 psi | 90% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,203 psi | 90% | 2923 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,097 psi | 80% | 2897 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 56,840 psi | 89% | 2904 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,839 psi | 86% | 2877 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,085 psi | 86% | 2864 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,637 psi | 87% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,869 psi | 88% | 2913 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,259 psi | 87% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,275 psi | 88% | 2894 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,927 psi | 89% | 2910 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,969 psi | 86% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,419 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,868 psi | 86% | 2828 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,604 psi | 79% | 2894 fps | 96.3% |
| Somchem S335 | <<locked>> | 84% | 54,375 psi | 85% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,941 psi | 88% | 2881 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,174 psi | 90% | 2917 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 2992 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 2881 fps | 97.4% |
| Unknown powder | <<locked>> | 94% | 55,158 psi | 86% | 2946 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 82% | 56,782 psi | 89% | 2759 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,752 psi | 86% | 2749 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,624 psi | 90% | 2838 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,537 psi | 90% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,158 psi | 86% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,666 psi | 87% | 2917 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 56,884 psi | 89% | 2890 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,276 psi | 90% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,057 psi | 88% | 2966 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,022 psi | 75% | 2881 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,826 psi | 89% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,767 psi | 87% | 2972 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2825 fps | 99.9% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2904 fps | 96.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 52,344 psi | 82% | 2733 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,353 psi | 71% | 2664 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,227 psi | 80% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,991 psi | 71% | 2654 fps | 95.5% |
| Accurate 3100 | <<locked>> | 94% | 37,275 psi | 58% | 2605 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,873 psi | 67% | 2664 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,894 psi | 50% | 2493 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 48,530 psi | 76% | 2782 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,205 psi | 65% | 2631 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 49,864 psi | 78% | 2871 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,575 psi | 79% | 2785 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,547 psi | 81% | 2762 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,556 psi | 70% | 2828 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,191 psi | 65% | 2657 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,164 psi | 69% | 2723 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,010 psi | 50% | 2507 fps | 95.2% |
| Alliant Reloder-17 | 56.4 gr | 80% | 35,694 psi | 56% | 2635 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,095 psi | 77% | 2861 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,978 psi | 44% | 2418 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,171 psi | 54% | 2651 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,993 psi | 75% | 2792 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 41,162 psi | 65% | 2664 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 44,454 psi | 70% | 2690 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,156 psi | 82% | 2769 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,922 psi | 78% | 2812 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 53,795 psi | 84% | 2815 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,829 psi | 66% | 2667 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 84% | 42,380 psi | 66% | 2733 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 90% | 46,760 psi | 73% | 2769 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 49,023 psi | 77% | 2795 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,399 psi | 46% | 2405 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,728 psi | 67% | 2723 fps | 99.7% |
| Hodgdon Superformance | 65.6 gr | 88% | 44,077 psi | 69% | 2792 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 42% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,410 psi | 68% | 2680 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 45,092 psi | 71% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,437 psi | 63% | 2608 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,569 psi | 67% | 2628 fps | 95.7% |
| IMR 4350 | <<locked>> | 90% | 44,788 psi | 70% | 2720 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,683 psi | 64% | 2615 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 31,995 psi | 50% | 2480 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 45,252 psi | 71% | 2753 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 50,575 psi | 79% | 2785 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,095 psi | 75% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,993 psi | 75% | 2713 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,308 psi | 68% | 2667 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,679 psi | 56% | 2507 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 41,002 psi | 64% | 2648 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 47,471 psi | 74% | 2730 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,906 psi | 75% | 2733 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,511 psi | 68% | 2710 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 47,688 psi | 75% | 2812 fps | 95.1% |
| Norma MRP | <<locked>> | 96% | 42,221 psi | 66% | 2805 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 32,126 psi | 50% | 2493 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 43,308 psi | 68% | 2726 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,101 psi | 60% | 2648 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 50,546 psi | 79% | 2799 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,401 psi | 79% | 2818 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 43% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,872 psi | 66% | 2648 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,891 psi | 73% | 2831 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,000 psi | 60% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,910 psi | 53% | 2566 fps | 95.6% |
| ReloadSwiss RS 70 | 60.2 gr | 84% | 36,013 psi | 56% | 2631 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 51,561 psi | 81% | 2766 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,310 psi | 71% | 2687 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,667 psi | 61% | 2608 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 47,906 psi | 75% | 2841 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 44,454 psi | 70% | 2690 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,679 psi | 56% | 2507 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,095 psi | 75% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,308 psi | 68% | 2667 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,002 psi | 64% | 2648 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,581 psi | 62% | 2657 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,081 psi | 77% | 2776 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,891 psi | 73% | 2749 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,675 psi | 76% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,785 psi | 64% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,351 psi | 66% | 2612 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,442 psi | 74% | 2835 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 48,240 psi | 76% | 2674 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,849 psi | 77% | 2772 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,305 psi | 62% | 2608 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 28,834 psi | 45% | 2448 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 42,656 psi | 67% | 2710 fps | 95.1% |
| Unknown powder | <<locked>> | 80% | 34,824 psi | 55% | 2552 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 53,635 psi | 84% | 2717 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,876 psi | 72% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,063 psi | 71% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,744 psi | 70% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,562 psi | 53% | 2461 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 34,824 psi | 55% | 2530 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 53,432 psi | 84% | 2841 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,512 psi | 70% | 2680 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,418 psi | 56% | 2572 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 86% | 30,255 psi | 47% | 2493 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,112 psi | 52% | 2474 fps | 97.8% |
| Winchester 760 | <<locked>> | 84% | 42,380 psi | 66% | 2733 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,065 psi | 44% | 2493 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,079 psi | 74% | 2782 fps | 95% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 117 powders for .300 WSM loaded with the .308 | 168gr | Sierra MatchKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,041 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, ADI AR 2213 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 168gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Bofors RP15, Hodgdon H4831 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.