Load Specifications
Load data in caliber .300 WSM with .308 | 165gr | Barnes BND SPIT-FIRE bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon Superformance 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>> | 84% | 56,115 psi | 88% | 2792 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,071 psi | 86% | 2822 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,853 psi | 86% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,071 psi | 86% | 2825 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,061 psi | 66% | 2713 fps | 96.2% |
| Accurate 4064 | <<locked>> | 90% | 54,882 psi | 86% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,810 psi | 86% | 2953 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 55,216 psi | 87% | 2897 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,144 psi | 88% | 2897 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,638 psi | 90% | 2897 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,172 psi | 86% | 2825 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,013 psi | 86% | 3018 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,362 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,014 psi | 89% | 2943 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3009 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,377 psi | 90% | 3048 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,132 psi | 63% | 2743 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,976 psi | 70% | 2907 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,042 psi | 86% | 2913 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 57,145 psi | 90% | 2940 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,087 psi | 89% | 2907 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,796 psi | 87% | 2828 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,305 psi | 90% | 2930 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,550 psi | 87% | 2976 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 57,508 psi | 90% | 2877 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,302 psi | 85% | 2897 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 55,608 psi | 87% | 2972 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 98% | 56,028 psi | 88% | 2930 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 55,753 psi | 87% | 2910 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2884 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,317 psi | 87% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,592 psi | 86% | 2982 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 56% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,869 psi | 88% | 2894 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 57,711 psi | 90% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,984 psi | 86% | 2871 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 57,740 psi | 90% | 2890 fps | 98.2% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 2933 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,405 psi | 87% | 2884 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 2844 fps | 99.1% |
| IMR 4895 | <<locked>> | 88% | 54,824 psi | 86% | 2920 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 57,638 psi | 90% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,100 psi | 86% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,679 psi | 86% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,593 psi | 87% | 2877 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,911 psi | 86% | 2881 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 55,767 psi | 87% | 2913 fps | 98.2% |
| Norma 201 | <<locked>> | 88% | 57,522 psi | 90% | 2894 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,476 psi | 85% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,173 psi | 88% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,331 psi | 85% | 2927 fps | 96% |
| Norma URPᴾ | <<locked>> | 100% | 57,479 psi | 90% | 2992 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 56,739 psi | 89% | 2956 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2986 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 54,331 psi | 85% | 2864 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,070 psi | 85% | 2884 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,027 psi | 86% | 2851 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,143 psi | 57% | 1811 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,145 psi | 90% | 2877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,665 psi | 86% | 2877 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,522 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,159 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,505 psi | 85% | 2976 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,099 psi | 85% | 3002 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 54,839 psi | 86% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,578 psi | 86% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,000 psi | 89% | 2930 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,087 psi | 89% | 2907 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,911 psi | 86% | 2881 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,100 psi | 86% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,593 psi | 87% | 2877 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,767 psi | 87% | 2913 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,129 psi | 86% | 2940 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,565 psi | 89% | 2900 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,087 psi | 89% | 2920 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,405 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,579 psi | 87% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,998 psi | 86% | 2831 fps | 97.8% |
| Somchem S321 | <<locked>> | 82% | 55,259 psi | 87% | 2881 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,766 psi | 86% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,159 psi | 88% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,043 psi | 89% | 2923 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,648 psi | 81% | 2940 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,196 psi | 76% | 2818 fps | 96% |
| Unknown powder | <<locked>> | 96% | 54,810 psi | 86% | 2946 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 57,261 psi | 90% | 2772 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,042 psi | 86% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,609 psi | 90% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,580 psi | 90% | 2861 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,839 psi | 86% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,506 psi | 87% | 2920 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 57,305 psi | 90% | 2904 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,479 psi | 90% | 2890 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,564 psi | 87% | 2963 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,990 psi | 69% | 2818 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,797 psi | 89% | 2917 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,071 psi | 86% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,608 psi | 87% | 2972 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,810 psi | 56% | 2743 fps | 98.9% |
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% | 49,472 psi | 78% | 2700 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,438 psi | 67% | 2631 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,819 psi | 75% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,254 psi | 76% | 2713 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 39,218 psi | 61% | 2654 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 40,147 psi | 63% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,678 psi | 53% | 2549 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 45,818 psi | 72% | 2740 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 38,943 psi | 61% | 2589 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,848 psi | 75% | 2746 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 48,298 psi | 76% | 2730 fps | 100% |
| Alliant Power Pro 2000-MR | 54.5 gr | 80% | 41,640 psi | 65% | 2772 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,522 psi | 60% | 2608 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,466 psi | 65% | 2674 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,939 psi | 53% | 2562 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,373 psi | 52% | 2579 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,414 psi | 46% | 2464 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,245 psi | 57% | 2707 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,063 psi | 71% | 2743 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 38,261 psi | 60% | 2612 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 47,326 psi | 74% | 2746 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,458 psi | 78% | 2733 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,746 psi | 73% | 2766 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,779 psi | 81% | 2920 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 50,879 psi | 80% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,131 psi | 61% | 2618 fps | 96.5% |
| Hodgdon H414 | <<locked>> | 86% | 42,322 psi | 66% | 2736 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 49,588 psi | 78% | 2825 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 46,224 psi | 72% | 2753 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,225 psi | 46% | 2405 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,784 psi | 62% | 2671 fps | 99.1% |
| Hodgdon Superformance | 65.2 gr | 92% | 47,181 psi | 74% | 2854 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,426 psi | 41% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,017 psi | 64% | 2635 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,076 psi | 66% | 2674 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,058 psi | 60% | 2562 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 84% | 42,699 psi | 67% | 2628 fps | 95.1% |
| IMR 4350 | <<locked>> | 92% | 44,570 psi | 70% | 2717 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,308 psi | 68% | 2671 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 33,634 psi | 53% | 2530 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,496 psi | 67% | 2707 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 47,848 psi | 75% | 2746 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 44,947 psi | 70% | 2717 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,672 psi | 72% | 2674 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 40,828 psi | 64% | 2625 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 38,043 psi | 60% | 2569 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 43,395 psi | 68% | 2697 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,904 psi | 70% | 2694 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 45,049 psi | 71% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,857 psi | 64% | 2664 fps | 98.6% |
| Norma 204 | <<locked>> | 96% | 50,821 psi | 80% | 2867 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 33,982 psi | 53% | 2549 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,379 psi | 63% | 2674 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 40,393 psi | 63% | 2703 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 47,761 psi | 75% | 2753 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,384 psi | 74% | 2772 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,445 psi | 81% | 2795 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 42% | 1621 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,577 psi | 84% | 2825 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,235 psi | 66% | 2657 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,613 psi | 68% | 2776 fps | 98.7% |
| ReloadSwiss RS 60 | 53.7 gr | 80% | 35,534 psi | 56% | 2648 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,810 psi | 56% | 2621 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,522 psi | 60% | 2690 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 48,762 psi | 76% | 2730 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,554 psi | 67% | 2638 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 36,013 psi | 56% | 2556 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 47,326 psi | 74% | 2746 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,043 psi | 60% | 2569 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,947 psi | 70% | 2717 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,828 psi | 64% | 2625 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 43,395 psi | 68% | 2697 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,912 psi | 58% | 2605 fps | 97.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,108 psi | 72% | 2726 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,135 psi | 69% | 2707 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,108 psi | 72% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,421 psi | 60% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,467 psi | 67% | 2615 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 51,880 psi | 81% | 2828 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,818 psi | 72% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,919 psi | 72% | 2726 fps | 99.3% |
| Somchem S355 | <<locked>> | 80% | 36,941 psi | 58% | 2566 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 26,818 psi | 42% | 2388 fps | 95.7% |
| Somchem S385 | <<locked>> | 98% | 45,136 psi | 71% | 2762 fps | 95.1% |
| Unknown powder | <<locked>> | 84% | 36,970 psi | 58% | 2608 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 50,850 psi | 80% | 2684 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,410 psi | 68% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,221 psi | 66% | 2621 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,235 psi | 66% | 2625 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,488 psi | 49% | 2415 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 82% | 34,635 psi | 54% | 2530 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 50,241 psi | 79% | 2795 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,771 psi | 65% | 2641 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,201 psi | 55% | 2575 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 31,604 psi | 50% | 2543 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,111 psi | 49% | 2425 fps | 96.4% |
| Winchester 748 | <<locked>> | 80% | 51,605 psi | 81% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,322 psi | 66% | 2736 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,617 psi | 46% | 2543 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 118 powders for .300 WSM loaded with the .308 | 165gr | Barnes BND SPIT-FIRE. Alliant Reloder-17 delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,048 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 165gr | Barnes BND SPIT-FIRE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.