Load Specifications
Load data in caliber .300 WSM with .308 | 170gr | Sierra Pro-Hunter 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, 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% | 54,723 psi | 86% | 2795 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,508 psi | 90% | 2864 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,197 psi | 77% | 2828 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 54,795 psi | 86% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,303 psi | 87% | 2946 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 57,566 psi | 90% | 2927 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,245 psi | 87% | 2877 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2986 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,275 psi | 88% | 2871 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,259 psi | 85% | 2999 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,767 psi | 87% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,072 psi | 88% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,898 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,334 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2972 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2910 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,325 psi | 73% | 2854 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,495 psi | 63% | 2759 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3045 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,682 psi | 90% | 2946 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,652 psi | 89% | 2920 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2910 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 56,318 psi | 88% | 2897 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,304 psi | 88% | 2904 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,319 psi | 90% | 2933 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,376 psi | 87% | 2963 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 94% | 55,724 psi | 87% | 2927 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 54,708 psi | 86% | 2881 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,086 psi | 88% | 2923 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,085 psi | 86% | 2923 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,099 psi | 85% | 2979 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 57% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,969 psi | 86% | 2871 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,406 psi | 90% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,696 psi | 90% | 2904 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,623 psi | 89% | 2881 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 56,913 psi | 89% | 2927 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,549 psi | 85% | 2874 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 2946 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,551 psi | 90% | 2949 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,028 psi | 88% | 2910 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 56,275 psi | 88% | 2871 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,447 psi | 85% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,536 psi | 89% | 2848 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,911 psi | 86% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,711 psi | 90% | 2920 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 55,651 psi | 87% | 2910 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,886 psi | 64% | 2677 fps | 96.8% |
| Norma 201 | <<locked>> | 84% | 56,507 psi | 89% | 2871 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,087 psi | 89% | 2864 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,361 psi | 87% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,998 psi | 85% | 2923 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2992 fps | 98.4% |
| Norma URP | <<locked>> | 96% | 57,508 psi | 90% | 2986 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,260 psi | 88% | 2936 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,332 psi | 87% | 3015 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 56,449 psi | 88% | 2986 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,138 psi | 75% | 2864 fps | 96.7% |
| Ramshot TAC | <<locked>> | 82% | 56,449 psi | 88% | 2897 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,608 psi | 89% | 2913 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,188 psi | 90% | 2917 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,276 psi | 90% | 2995 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,116 psi | 90% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,882 psi | 86% | 2966 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,740 psi | 90% | 3058 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,348 psi | 90% | 2848 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,072 psi | 89% | 2871 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,753 psi | 89% | 2913 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,621 psi | 86% | 2897 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 2956 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 56,318 psi | 88% | 2897 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,711 psi | 90% | 2920 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,447 psi | 85% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,911 psi | 86% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,651 psi | 87% | 2910 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,781 psi | 86% | 2923 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,259 psi | 87% | 2874 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,217 psi | 88% | 2900 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,319 psi | 90% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,694 psi | 86% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,259 psi | 85% | 2822 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2953 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 57,087 psi | 89% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,911 psi | 86% | 2864 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,739 psi | 89% | 2907 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,420 psi | 88% | 2986 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 2933 fps | 98.4% |
| Unknown powder | <<locked>> | 92% | 54,839 psi | 86% | 2940 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 86% | 57,203 psi | 90% | 2779 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,261 psi | 90% | 2828 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,884 psi | 89% | 2838 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,665 psi | 86% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,245 psi | 87% | 2907 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,963 psi | 72% | 2759 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 86% | 56,521 psi | 89% | 2861 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,709 psi | 87% | 2956 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,619 psi | 81% | 2930 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,115 psi | 88% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,376 psi | 87% | 2963 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,669 psi | 65% | 2894 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,722 psi | 84% | 2897 fps | 97.1% |
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% | 47,950 psi | 75% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,568 psi | 65% | 2589 fps | 95% |
| Accurate 3100 | <<locked>> | 92% | 37,434 psi | 59% | 2605 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 45,397 psi | 71% | 2700 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,040 psi | 53% | 2543 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 80% | 50,807 psi | 80% | 2818 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,265 psi | 68% | 2671 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 46,398 psi | 73% | 2808 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,881 psi | 83% | 2818 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,137 psi | 74% | 2877 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,439 psi | 68% | 2697 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,398 psi | 73% | 2762 fps | 99.6% |
| Alliant Reloder-16 | 54.8 gr | 80% | 33,779 psi | 53% | 2556 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,927 psi | 59% | 2684 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,847 psi | 72% | 2802 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,803 psi | 72% | 2844 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,920 psi | 44% | 2411 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,694 psi | 56% | 2638 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,229 psi | 54% | 2651 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,473 psi | 79% | 2835 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,424 psi | 68% | 2703 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 45,803 psi | 72% | 2844 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 41,205 psi | 65% | 2625 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,634 psi | 82% | 2848 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,150 psi | 69% | 2713 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 80% | 39,349 psi | 62% | 2664 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 86% | 43,482 psi | 68% | 2707 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 51,387 psi | 81% | 2831 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,198 psi | 49% | 2454 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,237 psi | 71% | 2762 fps | 100% |
| Hodgdon Superformance | 65.5 gr | 84% | 40,654 psi | 64% | 2720 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 42% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,629 psi | 72% | 2717 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,659 psi | 75% | 2749 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,438 psi | 67% | 2648 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,814 psi | 66% | 2612 fps | 96% |
| IMR 4350 | <<locked>> | 86% | 41,640 psi | 65% | 2654 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,147 psi | 63% | 2602 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 31,937 psi | 50% | 2474 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 47,601 psi | 75% | 2789 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,634 psi | 82% | 2854 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 52,881 psi | 83% | 2818 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,778 psi | 80% | 2795 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,140 psi | 79% | 2749 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,629 psi | 72% | 2707 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,594 psi | 59% | 2549 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 38,130 psi | 60% | 2582 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 35,853 psi | 56% | 2569 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 49,763 psi | 78% | 2766 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,314 psi | 79% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,774 psi | 72% | 2749 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 47,152 psi | 74% | 2802 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 39,494 psi | 62% | 2743 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,127 psi | 53% | 2539 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 45,861 psi | 72% | 2769 fps | 99.7% |
| Ramshot Grand | <<locked>> | 98% | 51,387 psi | 81% | 2946 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 84% | 37,913 psi | 59% | 2641 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 44,454 psi | 70% | 2795 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 52,910 psi | 83% | 2841 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,982 psi | 83% | 2858 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 43% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,222 psi | 69% | 2694 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,908 psi | 78% | 2881 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,350 psi | 63% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,707 psi | 53% | 2556 fps | 95.9% |
| ReloadSwiss RS 70 | 61.4 gr | 82% | 35,592 psi | 56% | 2621 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 53,882 psi | 84% | 2799 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,413 psi | 74% | 2720 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,915 psi | 64% | 2648 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 51,242 psi | 80% | 2841 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 44,788 psi | 70% | 2782 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 41,205 psi | 65% | 2625 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,594 psi | 59% | 2549 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,778 psi | 80% | 2795 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,629 psi | 72% | 2707 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,130 psi | 60% | 2582 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,076 psi | 66% | 2703 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,605 psi | 81% | 2818 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,443 psi | 77% | 2792 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,807 psi | 80% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,772 psi | 67% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,334 psi | 62% | 2549 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,367 psi | 70% | 2776 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 50,473 psi | 79% | 2703 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,387 psi | 81% | 2808 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,452 psi | 65% | 2651 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,647 psi | 48% | 2493 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 42,612 psi | 67% | 2707 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 36,854 psi | 58% | 2598 fps | 96.6% |
| Vihtavuori N133 | <<locked>> | 80% | 48,095 psi | 75% | 2648 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,500 psi | 74% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,050 psi | 74% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,607 psi | 56% | 2503 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 36,985 psi | 58% | 2575 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 98% | 43,047 psi | 67% | 2703 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 46,659 psi | 73% | 2713 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,594 psi | 59% | 2618 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 84% | 30,443 psi | 48% | 2490 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,896 psi | 55% | 2516 fps | 98.6% |
| Winchester 760 | <<locked>> | 80% | 39,349 psi | 62% | 2664 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,036 psi | 44% | 2500 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,673 psi | 73% | 2776 fps | 95.5% |
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 113 powders for .300 WSM loaded with the .308 | 170gr | Sierra Pro-Hunter. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,058 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,058 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 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 170.0 gr projectile in 0.308" calls for a 1:6.0 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 | 170gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, 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.