Load Specifications
Load data in caliber .300 WSM with .308 | 180gr | Sellier & Bellot SPRN bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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 2495 | <<locked>> | 84% | 54,926 psi | 86% | 2710 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,317 psi | 85% | 2733 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2756 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 55,114 psi | 86% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,564 psi | 87% | 2864 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 54,534 psi | 85% | 2792 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,579 psi | 87% | 2795 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2904 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,724 psi | 89% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,723 psi | 86% | 2917 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,217 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,536 psi | 89% | 2841 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,362 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,740 psi | 90% | 2946 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 2890 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2831 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,470 psi | 73% | 2776 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,698 psi | 64% | 2687 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,156 psi | 83% | 2966 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,273 psi | 85% | 2808 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 57,072 psi | 89% | 2835 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2831 fps | 96.9% |
| Bofors RP7 | <<locked>> | 92% | 56,507 psi | 89% | 2815 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,608 psi | 89% | 2818 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,740 psi | 90% | 2854 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,622 psi | 87% | 2884 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 56,028 psi | 88% | 2848 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 55,114 psi | 86% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,608 psi | 89% | 2841 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,405 psi | 87% | 2841 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,302 psi | 85% | 2894 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 57% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,230 psi | 87% | 2789 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,230 psi | 85% | 2759 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,621 psi | 86% | 2769 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,797 psi | 89% | 2795 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 57,174 psi | 90% | 2844 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,897 psi | 86% | 2795 fps | 98.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 2864 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,636 psi | 86% | 2818 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2831 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 82% | 56,724 psi | 89% | 2785 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,810 psi | 86% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,884 psi | 89% | 2766 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,201 psi | 87% | 2772 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,665 psi | 86% | 2789 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 55,782 psi | 87% | 2828 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,133 psi | 64% | 2608 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 56,710 psi | 89% | 2785 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,348 psi | 90% | 2779 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,811 psi | 87% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,375 psi | 85% | 2844 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2913 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 54,273 psi | 85% | 2848 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,579 psi | 89% | 2854 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2936 fps | 97% |
| Ramshot Hunter | <<locked>> | 96% | 56,710 psi | 89% | 2904 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,254 psi | 76% | 2789 fps | 97.2% |
| Ramshot TAC | <<locked>> | 82% | 56,753 psi | 89% | 2815 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,898 psi | 89% | 2828 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,143 psi | 85% | 2782 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,566 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,363 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,448 psi | 87% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,143 psi | 85% | 2913 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 57,493 psi | 90% | 2756 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,276 psi | 90% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,188 psi | 90% | 2831 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,984 psi | 86% | 2818 fps | 96.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2877 fps | 98% |
| Rottweil R 907 | <<locked>> | 92% | 56,507 psi | 89% | 2815 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,665 psi | 86% | 2789 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,810 psi | 86% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,201 psi | 87% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,782 psi | 87% | 2828 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,027 psi | 86% | 2838 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,550 psi | 87% | 2795 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,420 psi | 88% | 2815 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,360 psi | 85% | 2671 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,955 psi | 86% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,549 psi | 85% | 2743 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 2871 fps | 97.9% |
| Somchem S335 | <<locked>> | 84% | 57,276 psi | 90% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,230 psi | 87% | 2782 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,043 psi | 89% | 2825 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,956 psi | 89% | 2815 fps | 96.1% |
| Somchem S365 | <<locked>> | 98% | 56,956 psi | 89% | 2904 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,608 psi | 87% | 2851 fps | 98.7% |
| Unknown powder | <<locked>> | 92% | 55,172 psi | 86% | 2854 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 86% | 57,682 psi | 90% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,464 psi | 90% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,276 psi | 90% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,013 psi | 86% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,709 psi | 87% | 2825 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2690 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 86% | 56,753 psi | 89% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,898 psi | 88% | 2874 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,141 psi | 82% | 2854 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,492 psi | 89% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,622 psi | 87% | 2884 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,887 psi | 66% | 2818 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,969 psi | 85% | 2818 fps | 97.5% |
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 2495 | <<locked>> | 80% | 48,428 psi | 76% | 2621 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,800 psi | 66% | 2516 fps | 95.6% |
| Accurate 3100 | <<locked>> | 90% | 35,201 psi | 55% | 2480 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 45,832 psi | 72% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,301 psi | 54% | 2474 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 51,126 psi | 80% | 2740 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,613 psi | 68% | 2595 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 43,729 psi | 69% | 2674 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,171 psi | 83% | 2736 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,514 psi | 74% | 2799 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,830 psi | 69% | 2621 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,659 psi | 73% | 2684 fps | 99.8% |
| Alliant Reloder-16 | 52.7 gr | 80% | 33,910 psi | 53% | 2487 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,218 psi | 60% | 2612 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,308 psi | 68% | 2671 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,279 psi | 68% | 2717 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,397 psi | 41% | 2297 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,823 psi | 53% | 2520 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,213 psi | 50% | 2526 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,923 psi | 80% | 2756 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 43,758 psi | 69% | 2628 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,279 psi | 68% | 2717 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 41,510 psi | 65% | 2552 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,040 psi | 83% | 2769 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,295 psi | 69% | 2635 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,653 psi | 62% | 2592 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 86% | 43,787 psi | 69% | 2635 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 51,648 psi | 81% | 2749 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,502 psi | 49% | 2388 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,397 psi | 71% | 2684 fps | 100% |
| Hodgdon Superformance | 63 gr | 84% | 40,770 psi | 64% | 2648 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 42% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,977 psi | 72% | 2641 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,906 psi | 75% | 2667 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,656 psi | 67% | 2572 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,235 psi | 66% | 2543 fps | 96.5% |
| IMR 4350 | <<locked>> | 84% | 39,291 psi | 62% | 2530 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,335 psi | 63% | 2530 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 30,269 psi | 47% | 2359 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 47,863 psi | 75% | 2710 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,968 psi | 83% | 2779 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 53,171 psi | 83% | 2736 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,271 psi | 80% | 2717 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,517 psi | 79% | 2671 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,977 psi | 72% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,913 psi | 59% | 2484 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 38,435 psi | 60% | 2513 fps | 95.7% |
| Lovex S071 | <<locked>> | 94% | 33,982 psi | 53% | 2454 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,198 psi | 79% | 2687 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,749 psi | 80% | 2687 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,064 psi | 72% | 2671 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,396 psi | 70% | 2671 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 39,755 psi | 62% | 2674 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,519 psi | 54% | 2477 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,238 psi | 72% | 2690 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 48,008 psi | 75% | 2802 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 82% | 35,694 psi | 56% | 2513 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 96% | 41,597 psi | 65% | 2661 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 53,316 psi | 84% | 2762 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,359 psi | 84% | 2779 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 43% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,440 psi | 70% | 2618 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,198 psi | 79% | 2799 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,611 psi | 64% | 2671 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,997 psi | 53% | 2490 fps | 96.5% |
| ReloadSwiss RS 70 | 57.7 gr | 80% | 33,504 psi | 53% | 2493 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 54,128 psi | 85% | 2710 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,761 psi | 75% | 2641 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,350 psi | 65% | 2579 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,356 psi | 76% | 2710 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 42,134 psi | 66% | 2651 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 41,510 psi | 65% | 2552 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,913 psi | 59% | 2484 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,271 psi | 80% | 2717 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,977 psi | 72% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,435 psi | 60% | 2513 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,250 psi | 66% | 2625 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,040 psi | 82% | 2740 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,647 psi | 78% | 2710 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,053 psi | 80% | 2625 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,989 psi | 67% | 2497 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,101 psi | 58% | 2428 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,498 psi | 70% | 2700 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 50,850 psi | 80% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,808 psi | 81% | 2730 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,843 psi | 66% | 2575 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 53,171 psi | 83% | 2756 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 31,038 psi | 49% | 2434 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 40,190 psi | 63% | 2582 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 37,115 psi | 58% | 2526 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 80% | 48,443 psi | 76% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,776 psi | 75% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,442 psi | 74% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,824 psi | 56% | 2431 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 37,347 psi | 59% | 2507 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 96% | 40,741 psi | 64% | 2582 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,978 psi | 74% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,797 psi | 59% | 2546 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 28,703 psi | 45% | 2372 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,201 psi | 55% | 2451 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 39,653 psi | 62% | 2592 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,455 psi | 41% | 2379 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,743 psi | 69% | 2644 fps | 95.1% |
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 115 powders for .300 WSM loaded with the .308 | 180gr | Sellier & Bellot SPRN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,966 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 180gr | Sellier & Bellot SPRN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Bofors RP30 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.