Load Specifications
Load data in caliber .300 WSM with .308 | 165gr | Swift A-Frame 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.
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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% | 55,593 psi | 87% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,679 psi | 86% | 2831 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,549 psi | 85% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,592 psi | 86% | 2841 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,484 psi | 71% | 2792 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 55,027 psi | 86% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,071 psi | 86% | 2972 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,563 psi | 86% | 2907 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,738 psi | 87% | 2913 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 2946 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,913 psi | 89% | 2907 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,853 psi | 86% | 2831 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,505 psi | 85% | 3035 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,057 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,695 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,912 psi | 88% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,246 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 2933 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,931 psi | 67% | 2818 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,660 psi | 76% | 2999 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,607 psi | 86% | 2927 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 57,000 psi | 89% | 2953 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,521 psi | 89% | 2923 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,969 psi | 86% | 2838 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,927 psi | 89% | 2943 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,116 psi | 90% | 2890 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,609 psi | 90% | 2966 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,622 psi | 87% | 2992 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 56,028 psi | 88% | 2956 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 55,187 psi | 86% | 2920 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,999 psi | 88% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,317 psi | 87% | 2959 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,462 psi | 85% | 3005 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,752 psi | 56% | 1798 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,376 psi | 87% | 2907 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 57,740 psi | 90% | 2930 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,462 psi | 85% | 2884 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,043 psi | 89% | 2910 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 57,188 psi | 90% | 2956 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,926 psi | 86% | 2904 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 2920 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,491 psi | 85% | 2936 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,913 psi | 89% | 2907 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,766 psi | 86% | 2887 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,319 psi | 90% | 2887 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,143 psi | 86% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,505 psi | 85% | 2897 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 55,724 psi | 87% | 2936 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 56,840 psi | 89% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,377 psi | 90% | 2904 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,912 psi | 88% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,215 psi | 85% | 2946 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 48,095 psi | 75% | 2949 fps | 97% |
| Norma URP | <<locked>> | 98% | 57,435 psi | 90% | 3012 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 56,391 psi | 88% | 2969 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,275 psi | 88% | 3012 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 57,305 psi | 90% | 2933 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,043 psi | 89% | 2949 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,696 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,419 psi | 57% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,273 psi | 85% | 2894 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,363 psi | 90% | 3028 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,942 psi | 89% | 3061 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,752 psi | 86% | 2995 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,824 psi | 84% | 3022 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,418 psi | 85% | 2835 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,406 psi | 90% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,840 psi | 89% | 2946 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 2917 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 56,521 psi | 89% | 2923 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,505 psi | 85% | 2897 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,766 psi | 86% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,143 psi | 86% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,724 psi | 87% | 2936 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,882 psi | 86% | 2953 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,956 psi | 88% | 2913 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,652 psi | 89% | 2933 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,578 psi | 86% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,187 psi | 86% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,781 psi | 86% | 2851 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2910 fps | 96% |
| Somchem S335 | <<locked>> | 86% | 57,522 psi | 90% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,622 psi | 87% | 2900 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,855 psi | 89% | 2940 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,883 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% | 2963 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 82% | 56,695 psi | 89% | 2785 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,665 psi | 86% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,406 psi | 90% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,305 psi | 90% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,839 psi | 86% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,230 psi | 87% | 2936 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 56,681 psi | 89% | 2913 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,000 psi | 89% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,666 psi | 87% | 2982 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2900 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,304 psi | 88% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,622 psi | 87% | 2992 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,580 psi | 60% | 2841 fps | 99.8% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 2923 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% | 52,257 psi | 82% | 2759 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,179 psi | 71% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,010 psi | 80% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,788 psi | 70% | 2671 fps | 95.2% |
| Accurate 3100 | <<locked>> | 96% | 39,668 psi | 62% | 2677 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 42,757 psi | 67% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,953 psi | 53% | 2569 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,138 psi | 75% | 2802 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,915 psi | 64% | 2648 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 49,719 psi | 78% | 2887 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,241 psi | 79% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,401 psi | 81% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,338 psi | 69% | 2848 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,857 psi | 64% | 2671 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,787 psi | 69% | 2740 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,779 psi | 53% | 2575 fps | 95.8% |
| Alliant Reloder-17 | 56.9 gr | 80% | 35,549 psi | 56% | 2651 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,689 psi | 76% | 2877 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,588 psi | 46% | 2487 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,084 psi | 53% | 2667 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,761 psi | 75% | 2812 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 40,799 psi | 64% | 2680 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,077 psi | 69% | 2703 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,808 psi | 81% | 2789 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,705 psi | 78% | 2835 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 53,388 psi | 84% | 2838 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,481 psi | 65% | 2684 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 84% | 42,119 psi | 66% | 2749 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 90% | 46,528 psi | 73% | 2789 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 48,660 psi | 76% | 2812 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,298 psi | 46% | 2421 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,308 psi | 66% | 2740 fps | 99.6% |
| Hodgdon Superformance | 66.1 gr | 88% | 43,714 psi | 69% | 2805 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 42% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,352 psi | 68% | 2700 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 44,802 psi | 70% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,176 psi | 63% | 2625 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,264 psi | 66% | 2641 fps | 95.4% |
| IMR 4350 | <<locked>> | 90% | 44,541 psi | 70% | 2736 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,062 psi | 67% | 2687 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 33,794 psi | 53% | 2549 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 44,904 psi | 70% | 2769 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,241 psi | 79% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,892 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% | 37,811 psi | 59% | 2582 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 40,785 psi | 64% | 2664 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,355 psi | 74% | 2753 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,543 psi | 75% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,178 psi | 68% | 2726 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,647 psi | 79% | 2887 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 42,032 psi | 66% | 2822 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 34,113 psi | 53% | 2569 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,120 psi | 68% | 2746 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 37,884 psi | 59% | 2664 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 50,299 psi | 79% | 2818 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,937 psi | 78% | 2838 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 54,201 psi | 85% | 2858 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 42% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,727 psi | 65% | 2664 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,688 psi | 73% | 2851 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,797 psi | 59% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,518 psi | 53% | 2579 fps | 95.2% |
| ReloadSwiss RS 70 | 60.7 gr | 84% | 35,810 psi | 56% | 2644 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 51,242 psi | 80% | 2785 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,005 psi | 71% | 2703 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,348 psi | 60% | 2621 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 47,485 psi | 74% | 2858 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 44,077 psi | 69% | 2703 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,811 psi | 59% | 2582 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,892 psi | 75% | 2782 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,207 psi | 68% | 2690 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,785 psi | 64% | 2664 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,392 psi | 62% | 2674 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,849 psi | 77% | 2795 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,731 psi | 73% | 2772 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,399 psi | 76% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,524 psi | 64% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,163 psi | 66% | 2628 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,021 psi | 74% | 2851 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,153 psi | 75% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,646 psi | 76% | 2792 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,189 psi | 61% | 2628 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,587 psi | 45% | 2461 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 45,266 psi | 71% | 2785 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 34,519 psi | 54% | 2569 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 53,345 psi | 84% | 2740 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,614 psi | 71% | 2638 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,773 psi | 70% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,643 psi | 70% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,460 psi | 52% | 2477 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,664 psi | 54% | 2546 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 53,040 psi | 83% | 2861 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,193 psi | 69% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,114 psi | 55% | 2585 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 32,097 psi | 50% | 2566 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,967 psi | 52% | 2490 fps | 97.5% |
| Winchester 760 | <<locked>> | 84% | 42,119 psi | 66% | 2749 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,876 psi | 44% | 2507 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,082 psi | 78% | 2858 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 | Swift A-Frame. Alliant Reloder-17 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,064 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 1:14.5 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 | 165gr | Swift A-Frame 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.