Load Specifications
Load data in caliber .300 WSM with .308 | 170gr | Speer Hot-Cor 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 56,724 psi | 89% | 2779 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,014 psi | 88% | 2805 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,840 psi | 88% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,753 psi | 87% | 2822 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 2782 fps | 98% |
| Accurate 4064 | <<locked>> | 88% | 56,362 psi | 88% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,623 psi | 89% | 2956 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,724 psi | 87% | 2887 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,898 psi | 89% | 2890 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 2933 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,679 psi | 86% | 2835 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,144 psi | 88% | 2805 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,883 psi | 88% | 3015 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,348 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,302 psi | 85% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,305 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,926 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,301 psi | 84% | 2923 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,135 psi | 69% | 2805 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2703 fps | 96.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,169 psi | 79% | 2989 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,825 psi | 87% | 2904 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 54,607 psi | 86% | 2877 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 57,740 psi | 90% | 2907 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,999 psi | 88% | 2812 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,302 psi | 85% | 2864 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,390 psi | 87% | 2894 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 57,043 psi | 89% | 2979 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 96% | 57,305 psi | 90% | 2940 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 84% | 56,362 psi | 88% | 2897 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,508 psi | 90% | 2933 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,666 psi | 89% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,883 psi | 88% | 2992 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,868 psi | 56% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,521 psi | 89% | 2884 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,434 psi | 87% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,608 psi | 87% | 2861 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,839 psi | 86% | 2838 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 54,824 psi | 86% | 2881 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,072 psi | 88% | 2884 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2904 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 55,724 psi | 87% | 2913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,679 psi | 86% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,072 psi | 88% | 2861 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,013 psi | 86% | 2815 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,347 psi | 88% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,724 psi | 87% | 2877 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 57,029 psi | 89% | 2917 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,841 psi | 61% | 2628 fps | 96% |
| Norma 201 | <<locked>> | 84% | 54,578 psi | 86% | 2831 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,187 psi | 86% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,174 psi | 90% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,579 psi | 87% | 2933 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2936 fps | 97.7% |
| Norma URP | <<locked>> | 96% | 55,376 psi | 87% | 2943 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,114 psi | 85% | 2894 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,041 psi | 85% | 2936 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 54,694 psi | 86% | 2858 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,679 psi | 86% | 2874 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,550 psi | 57% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,463 psi | 87% | 2877 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,940 psi | 86% | 2953 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,621 psi | 86% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,318 psi | 88% | 2979 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,216 psi | 87% | 3005 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 55,492 psi | 87% | 2808 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,187 psi | 86% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,433 psi | 85% | 2871 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 2904 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2904 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 94% | 57,740 psi | 90% | 2907 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,724 psi | 87% | 2877 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,072 psi | 88% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,347 psi | 88% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,029 psi | 89% | 2917 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,217 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,217 psi | 90% | 2894 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,288 psi | 85% | 2861 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,637 psi | 87% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,318 psi | 88% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,941 psi | 88% | 2831 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2900 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 55,274 psi | 87% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,869 psi | 89% | 2881 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,752 psi | 86% | 2871 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 2992 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 2884 fps | 97.7% |
| Unknown powder | <<locked>> | 94% | 56,115 psi | 88% | 2946 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 57,740 psi | 90% | 2756 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,738 psi | 87% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,158 psi | 86% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,071 psi | 86% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,101 psi | 88% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,623 psi | 89% | 2917 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 86% | 54,621 psi | 86% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,043 psi | 89% | 2966 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,313 psi | 77% | 2887 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,682 psi | 90% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,043 psi | 89% | 2979 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,682 psi | 62% | 2835 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 2910 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 2015 | <<locked>> | 80% | 53,330 psi | 84% | 2733 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,311 psi | 73% | 2667 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,228 psi | 82% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,888 psi | 67% | 2602 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 38,101 psi | 60% | 2612 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 43,830 psi | 69% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,518 psi | 51% | 2497 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 49,168 psi | 77% | 2779 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,785 psi | 65% | 2631 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 47,616 psi | 75% | 2815 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,271 psi | 80% | 2782 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,634 psi | 82% | 2759 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,426 psi | 71% | 2831 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,829 psi | 66% | 2654 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,802 psi | 70% | 2720 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,503 psi | 51% | 2510 fps | 95.7% |
| Alliant Reloder-17 | 56.9 gr | 80% | 36,463 psi | 57% | 2641 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,978 psi | 74% | 2808 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,471 psi | 45% | 2421 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,535 psi | 57% | 2648 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,070 psi | 55% | 2661 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,849 psi | 77% | 2795 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 41,843 psi | 66% | 2664 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,380 psi | 66% | 2638 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,779 psi | 83% | 2766 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,865 psi | 80% | 2812 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,467 psi | 67% | 2671 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 82% | 40,451 psi | 63% | 2680 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 44,788 psi | 70% | 2720 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,719 psi | 78% | 2792 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,052 psi | 47% | 2411 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,381 psi | 68% | 2720 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 41,785 psi | 65% | 2733 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 42% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,280 psi | 69% | 2680 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 45,905 psi | 72% | 2713 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,060 psi | 64% | 2608 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,567 psi | 64% | 2572 fps | 95.3% |
| IMR 4350 | <<locked>> | 88% | 42,699 psi | 67% | 2667 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,249 psi | 65% | 2615 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 32,590 psi | 51% | 2484 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 45,948 psi | 72% | 2749 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,271 psi | 80% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,052 psi | 77% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,820 psi | 77% | 2713 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,179 psi | 69% | 2671 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,390 psi | 57% | 2513 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 39,117 psi | 61% | 2592 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 36,434 psi | 57% | 2572 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 48,356 psi | 76% | 2733 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,588 psi | 76% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,179 psi | 69% | 2707 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 48,559 psi | 76% | 2815 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 40,379 psi | 63% | 2753 fps | 95% |
| Norma URP | <<locked>> | 80% | 32,677 psi | 51% | 2497 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 44,208 psi | 69% | 2730 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 38,856 psi | 61% | 2654 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 51,329 psi | 80% | 2802 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,039 psi | 80% | 2818 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 43% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,670 psi | 67% | 2651 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,906 psi | 75% | 2835 fps | 99.6% |
| ReloadSwiss RS 60 | 56.9 gr | 80% | 38,769 psi | 61% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,242 psi | 51% | 2510 fps | 95% |
| ReloadSwiss RS 70 | 59.2 gr | 82% | 34,243 psi | 54% | 2572 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 52,272 psi | 82% | 2762 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,977 psi | 72% | 2684 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,334 psi | 62% | 2605 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 52,634 psi | 82% | 2851 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 96% | 45,774 psi | 72% | 2792 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 42,380 psi | 66% | 2638 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,390 psi | 57% | 2513 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,052 psi | 77% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,179 psi | 69% | 2671 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 39,117 psi | 61% | 2592 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,393 psi | 63% | 2657 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,951 psi | 78% | 2779 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,761 psi | 75% | 2753 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,356 psi | 77% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,394 psi | 65% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,509 psi | 63% | 2562 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,324 psi | 71% | 2782 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 49,110 psi | 77% | 2674 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,748 psi | 78% | 2772 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,132 psi | 63% | 2615 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 29,385 psi | 46% | 2451 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 43,511 psi | 68% | 2717 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 35,418 psi | 56% | 2556 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 54,346 psi | 85% | 2710 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,528 psi | 73% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,832 psi | 72% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,629 psi | 72% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,287 psi | 54% | 2464 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 35,592 psi | 56% | 2536 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 80% | 45,165 psi | 71% | 2677 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,027 psi | 56% | 2572 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 86% | 31,024 psi | 49% | 2503 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,736 psi | 53% | 2480 fps | 98.1% |
| Winchester 760 | <<locked>> | 82% | 40,451 psi | 63% | 2680 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,631 psi | 45% | 2507 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,906 psi | 75% | 2785 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 116 powders for .300 WSM loaded with the .308 | 170gr | Speer Hot-Cor. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,015 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 170.0 gr projectile in 0.308" calls for a 1:14.5 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 170gr | Speer Hot-Cor 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.