Load Specifications
Load data in caliber .300 WSM with .308 | 165gr | Sierra GameKing bullet and 101 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 55,550 psi | 87% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,679 psi | 86% | 2831 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,505 psi | 85% | 2884 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,549 psi | 85% | 2841 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,469 psi | 71% | 2792 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 54,984 psi | 86% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,027 psi | 86% | 2972 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,795 psi | 86% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,709 psi | 87% | 2910 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2949 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,159 psi | 90% | 2913 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,882 psi | 86% | 2835 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,549 psi | 85% | 3035 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,043 psi | 88% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,666 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,869 psi | 88% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,566 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 2936 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,902 psi | 67% | 2818 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,617 psi | 76% | 2999 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,563 psi | 86% | 2927 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 56,956 psi | 89% | 2956 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,768 psi | 89% | 2927 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,201 psi | 87% | 2844 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,884 psi | 89% | 2943 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,101 psi | 89% | 2890 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,099 psi | 85% | 2917 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 92% | 55,579 psi | 87% | 2995 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 56,057 psi | 88% | 2956 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 55,419 psi | 87% | 2923 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,985 psi | 88% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,288 psi | 87% | 2959 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,418 psi | 85% | 3005 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,737 psi | 56% | 1798 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,347 psi | 87% | 2907 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 57,711 psi | 90% | 2930 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,491 psi | 85% | 2884 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,029 psi | 89% | 2907 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 57,145 psi | 90% | 2953 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,897 psi | 86% | 2904 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2920 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,447 psi | 85% | 2936 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,159 psi | 90% | 2913 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,795 psi | 86% | 2887 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,276 psi | 90% | 2887 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,172 psi | 86% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,737 psi | 86% | 2900 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 55,724 psi | 87% | 2936 fps | 98.6% |
| Norma 201 | <<locked>> | 86% | 56,797 psi | 89% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,638 psi | 90% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,869 psi | 88% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,201 psi | 85% | 2949 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 48,312 psi | 76% | 2953 fps | 97.1% |
| Norma URP | <<locked>> | 98% | 57,464 psi | 90% | 3012 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 56,652 psi | 89% | 2976 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,231 psi | 88% | 3012 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 57,261 psi | 90% | 2933 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,276 psi | 90% | 2953 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,667 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,419 psi | 57% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,302 psi | 85% | 2897 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,363 psi | 90% | 3028 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,971 psi | 89% | 3061 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,708 psi | 86% | 2995 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,780 psi | 84% | 3022 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,404 psi | 85% | 2835 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,406 psi | 90% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,826 psi | 89% | 2946 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,865 psi | 80% | 2920 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 56,768 psi | 89% | 2927 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,737 psi | 86% | 2900 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,795 psi | 86% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,172 psi | 86% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,724 psi | 87% | 2936 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,868 psi | 86% | 2953 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,985 psi | 88% | 2913 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,623 psi | 89% | 2936 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,824 psi | 86% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,158 psi | 86% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,795 psi | 86% | 2851 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,372 psi | 79% | 2913 fps | 96.1% |
| Somchem S335 | <<locked>> | 86% | 57,493 psi | 90% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,622 psi | 87% | 2904 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,884 psi | 89% | 2943 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3012 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 2897 fps | 97.2% |
| Unknown powder | <<locked>> | 94% | 54,737 psi | 86% | 2966 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 82% | 56,666 psi | 89% | 2782 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,636 psi | 86% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,406 psi | 90% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,276 psi | 90% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,868 psi | 86% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,463 psi | 87% | 2940 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 56,652 psi | 89% | 2917 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,971 psi | 89% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,622 psi | 87% | 2986 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,805 psi | 75% | 2900 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,260 psi | 88% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,579 psi | 87% | 2995 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,609 psi | 61% | 2841 fps | 99.8% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2920 fps | 96.5% |
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% | 52,228 psi | 82% | 2756 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,208 psi | 71% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,966 psi | 80% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,759 psi | 70% | 2674 fps | 95.3% |
| Accurate 3100 | <<locked>> | 96% | 39,624 psi | 62% | 2677 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 42,743 psi | 67% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,924 psi | 53% | 2569 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,167 psi | 75% | 2802 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,104 psi | 64% | 2651 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 49,690 psi | 78% | 2890 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,212 psi | 79% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,401 psi | 81% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,309 psi | 69% | 2848 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,031 psi | 64% | 2677 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,758 psi | 69% | 2740 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,939 psi | 53% | 2582 fps | 95.9% |
| Alliant Reloder-17 | 56.9 gr | 80% | 35,534 psi | 56% | 2651 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,660 psi | 76% | 2877 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,602 psi | 46% | 2487 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,055 psi | 53% | 2667 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,761 psi | 75% | 2812 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 40,770 psi | 64% | 2680 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,106 psi | 69% | 2707 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,779 psi | 81% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,705 psi | 78% | 2835 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 53,635 psi | 84% | 2841 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,452 psi | 65% | 2687 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 84% | 42,090 psi | 66% | 2749 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 90% | 46,499 psi | 73% | 2789 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 48,631 psi | 76% | 2812 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,298 psi | 46% | 2425 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,279 psi | 66% | 2740 fps | 99.6% |
| Hodgdon Superformance | 66.2 gr | 88% | 43,903 psi | 69% | 2812 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 42% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,323 psi | 68% | 2703 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 44,773 psi | 70% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,161 psi | 63% | 2628 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,293 psi | 66% | 2644 fps | 95.5% |
| IMR 4350 | <<locked>> | 90% | 44,512 psi | 70% | 2736 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,091 psi | 68% | 2687 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 33,779 psi | 53% | 2549 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 44,875 psi | 70% | 2772 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,212 psi | 79% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,863 psi | 75% | 2782 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,906 psi | 75% | 2736 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,207 psi | 68% | 2690 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,782 psi | 59% | 2579 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 40,814 psi | 64% | 2664 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,326 psi | 74% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,761 psi | 75% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,149 psi | 68% | 2726 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,647 psi | 79% | 2887 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 41,989 psi | 66% | 2822 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 34,084 psi | 53% | 2569 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,091 psi | 68% | 2746 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 37,855 psi | 59% | 2664 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,328 psi | 79% | 2822 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,140 psi | 79% | 2841 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 54,172 psi | 85% | 2861 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 42% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,727 psi | 65% | 2667 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,688 psi | 73% | 2854 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,782 psi | 59% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,707 psi | 53% | 2585 fps | 95.3% |
| ReloadSwiss RS 70 | 60.7 gr | 84% | 35,824 psi | 56% | 2648 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,213 psi | 80% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,976 psi | 70% | 2703 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,508 psi | 60% | 2628 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 47,442 psi | 74% | 2858 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 44,106 psi | 69% | 2707 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,782 psi | 59% | 2579 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,863 psi | 75% | 2782 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,207 psi | 68% | 2690 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,814 psi | 64% | 2664 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,363 psi | 62% | 2674 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,849 psi | 77% | 2799 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,702 psi | 73% | 2772 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,370 psi | 76% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,495 psi | 63% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,134 psi | 66% | 2628 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,992 psi | 74% | 2851 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,124 psi | 75% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,617 psi | 76% | 2792 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,175 psi | 61% | 2631 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,572 psi | 45% | 2461 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 45,295 psi | 71% | 2785 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 34,519 psi | 54% | 2566 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 53,316 psi | 84% | 2740 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,585 psi | 71% | 2638 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,744 psi | 70% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,614 psi | 70% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,489 psi | 52% | 2480 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,650 psi | 54% | 2546 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 52,997 psi | 83% | 2861 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,164 psi | 69% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,085 psi | 55% | 2585 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 32,068 psi | 50% | 2566 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,953 psi | 52% | 2490 fps | 97.5% |
| Winchester 760 | <<locked>> | 84% | 42,090 psi | 66% | 2749 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,862 psi | 44% | 2507 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,314 psi | 79% | 2861 fps | 95.6% |
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 116 powders for .300 WSM loaded with the .308 | 165gr | Sierra GameKing. Alliant Reloder-17 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,071 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 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 165.0 gr projectile in 0.308" calls for a 1:14.0 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 | 165gr | Sierra GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Bofors RP15 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.