Load Specifications
Load data in caliber .300 WSM with .308 | 170gr | Lapua Lock Base bullet and 102 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% | 56,159 psi | 88% | 2766 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,463 psi | 87% | 2795 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,288 psi | 87% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,143 psi | 86% | 2812 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,282 psi | 73% | 2766 fps | 97.8% |
| Accurate 4064 | <<locked>> | 88% | 55,535 psi | 87% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,883 psi | 88% | 2943 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,230 psi | 87% | 2874 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,420 psi | 88% | 2881 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2920 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,580 psi | 90% | 2874 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,535 psi | 87% | 2795 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,172 psi | 86% | 2999 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,884 psi | 89% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,188 psi | 90% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,623 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,244 psi | 85% | 2976 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2907 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,598 psi | 68% | 2792 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 2690 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2972 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,143 psi | 86% | 2894 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 57,653 psi | 90% | 2917 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 57,348 psi | 90% | 2897 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,753 psi | 87% | 2808 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,464 psi | 90% | 2907 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,711 psi | 90% | 2851 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,708 psi | 86% | 2881 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 56,115 psi | 88% | 2959 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 96% | 56,710 psi | 89% | 2927 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 84% | 55,854 psi | 88% | 2884 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,811 psi | 89% | 2920 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,898 psi | 88% | 2923 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,071 psi | 86% | 2976 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 56% | 1768 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,999 psi | 88% | 2874 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,781 psi | 86% | 2844 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,143 psi | 86% | 2851 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,389 psi | 85% | 2825 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 54,215 psi | 85% | 2867 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,724 psi | 87% | 2874 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2890 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 55,187 psi | 86% | 2904 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,580 psi | 90% | 2874 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,288 psi | 87% | 2851 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,534 psi | 85% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,869 psi | 88% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,303 psi | 87% | 2867 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 56,376 psi | 88% | 2904 fps | 98.8% |
| Norma 201 | <<locked>> | 86% | 57,493 psi | 90% | 2867 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,650 psi | 86% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,434 psi | 88% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,998 psi | 86% | 2920 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 48,950 psi | 77% | 2923 fps | 97.5% |
| Norma URP | <<locked>> | 96% | 54,679 psi | 86% | 2930 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 57,363 psi | 90% | 2940 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,145 psi | 90% | 2982 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 54,302 psi | 85% | 2844 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,259 psi | 85% | 2864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,853 psi | 86% | 2861 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,389 psi | 85% | 2940 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,740 psi | 90% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,666 psi | 87% | 2966 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,665 psi | 86% | 2992 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 54,911 psi | 86% | 2799 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,679 psi | 86% | 2822 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,450 psi | 90% | 2910 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 2890 fps | 95.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2887 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 94% | 57,348 psi | 90% | 2897 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,303 psi | 87% | 2867 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,288 psi | 87% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,869 psi | 88% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,376 psi | 88% | 2904 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,535 psi | 87% | 2920 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,521 psi | 89% | 2877 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,435 psi | 90% | 2904 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,361 psi | 87% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,883 psi | 88% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,419 psi | 87% | 2818 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 2881 fps | 96.5% |
| Somchem S335 | <<locked>> | 84% | 54,781 psi | 86% | 2753 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,159 psi | 88% | 2867 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,725 psi | 90% | 2907 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 2979 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,344 psi | 82% | 2871 fps | 97.6% |
| Unknown powder | <<locked>> | 94% | 55,434 psi | 87% | 2933 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 57,159 psi | 90% | 2746 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,158 psi | 86% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,549 psi | 85% | 2782 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,317 psi | 85% | 2789 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,419 psi | 87% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,956 psi | 88% | 2904 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 57,334 psi | 90% | 2881 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,128 psi | 85% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,376 psi | 88% | 2953 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,385 psi | 76% | 2867 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,130 psi | 90% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,115 psi | 88% | 2959 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,059 psi | 61% | 2818 fps | 99.9% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2894 fps | 96.9% |
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% | 52,736 psi | 83% | 2720 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,730 psi | 72% | 2654 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,721 psi | 81% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,368 psi | 71% | 2644 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 37,492 psi | 59% | 2595 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,250 psi | 68% | 2654 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,053 psi | 50% | 2484 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 48,689 psi | 76% | 2769 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,510 psi | 65% | 2621 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 47,065 psi | 74% | 2802 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,749 psi | 80% | 2772 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,967 psi | 81% | 2749 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,744 psi | 70% | 2815 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,539 psi | 65% | 2648 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,280 psi | 69% | 2710 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,126 psi | 50% | 2497 fps | 95.4% |
| Alliant Reloder-17 | 56.3 gr | 80% | 36,027 psi | 56% | 2628 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,427 psi | 73% | 2795 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,123 psi | 44% | 2408 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,114 psi | 57% | 2635 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,563 psi | 54% | 2648 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,196 psi | 76% | 2779 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 41,336 psi | 65% | 2651 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 41,959 psi | 66% | 2625 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,243 psi | 82% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,125 psi | 79% | 2799 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 54,186 psi | 85% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,003 psi | 66% | 2657 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 82% | 40,001 psi | 63% | 2667 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 90% | 46,978 psi | 74% | 2759 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,168 psi | 77% | 2779 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,631 psi | 46% | 2398 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,873 psi | 67% | 2710 fps | 99.8% |
| Hodgdon Superformance | 65.4 gr | 88% | 44,324 psi | 69% | 2782 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 42% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,743 psi | 69% | 2667 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 45,252 psi | 71% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,741 psi | 64% | 2598 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,350 psi | 63% | 2566 fps | 95.2% |
| IMR 4350 | <<locked>> | 88% | 42,308 psi | 66% | 2654 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,828 psi | 64% | 2602 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 32,140 psi | 50% | 2470 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 45,411 psi | 71% | 2736 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 50,749 psi | 80% | 2772 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,530 psi | 76% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,327 psi | 76% | 2703 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,656 psi | 68% | 2657 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,955 psi | 56% | 2500 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 41,191 psi | 65% | 2635 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 47,819 psi | 75% | 2720 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,269 psi | 76% | 2723 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,656 psi | 68% | 2697 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 47,964 psi | 75% | 2802 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 42,699 psi | 67% | 2799 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 32,430 psi | 51% | 2490 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,540 psi | 68% | 2713 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,479 psi | 60% | 2641 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 50,705 psi | 79% | 2785 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,604 psi | 79% | 2805 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 43% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,250 psi | 66% | 2638 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,355 psi | 74% | 2822 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,334 psi | 60% | 2690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,113 psi | 53% | 2559 fps | 95.8% |
| ReloadSwiss RS 70 | 60 gr | 84% | 36,216 psi | 57% | 2621 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 51,924 psi | 81% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,440 psi | 71% | 2671 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,044 psi | 61% | 2598 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 98% | 52,054 psi | 82% | 2835 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 96% | 45,165 psi | 71% | 2776 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 41,959 psi | 66% | 2625 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,955 psi | 56% | 2500 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,530 psi | 76% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,656 psi | 68% | 2657 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,191 psi | 65% | 2635 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,929 psi | 63% | 2648 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,530 psi | 78% | 2769 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,282 psi | 74% | 2743 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,776 psi | 76% | 2661 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,901 psi | 64% | 2530 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,147 psi | 63% | 2552 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,732 psi | 75% | 2825 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 48,573 psi | 76% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,023 psi | 77% | 2759 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,610 psi | 62% | 2602 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 29,109 psi | 46% | 2441 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 42,931 psi | 67% | 2700 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 34,983 psi | 55% | 2543 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 53,722 psi | 84% | 2700 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,180 psi | 72% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,266 psi | 71% | 2644 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,092 psi | 71% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,837 psi | 53% | 2451 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 35,157 psi | 55% | 2523 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 80% | 53,592 psi | 84% | 2825 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,686 psi | 70% | 2667 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,592 psi | 56% | 2562 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 30,443 psi | 48% | 2484 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,272 psi | 52% | 2464 fps | 97.9% |
| Winchester 760 | <<locked>> | 82% | 40,001 psi | 63% | 2667 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,224 psi | 44% | 2490 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,398 psi | 74% | 2772 fps | 95.2% |
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 | 170gr | Lapua Lock Base. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,768 fps to 3,025 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 170.0 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 | 170gr | Lapua Lock Base 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.