Load Specifications
Load data in caliber .300 WSM with .308 | 165gr | RWS Speed Tip Professional 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 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.
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 2015 | <<locked>> | 84% | 56,579 psi | 89% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,811 psi | 87% | 2835 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,811 psi | 87% | 2887 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,811 psi | 87% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,811 psi | 87% | 2838 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,786 psi | 67% | 2730 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 55,637 psi | 87% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,709 psi | 87% | 2969 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 55,854 psi | 88% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,768 psi | 89% | 2910 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,737 psi | 86% | 2861 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,738 psi | 87% | 2831 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,593 psi | 87% | 3031 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,971 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,624 psi | 90% | 2959 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3025 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,476 psi | 85% | 3009 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,756 psi | 64% | 2759 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,571 psi | 71% | 2923 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,593 psi | 87% | 2927 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 54,099 psi | 85% | 2897 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,609 psi | 90% | 2923 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,434 psi | 88% | 2844 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,375 psi | 85% | 2894 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,275 psi | 88% | 2992 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 54,839 psi | 86% | 2844 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,172 psi | 86% | 2913 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 56,391 psi | 88% | 2989 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 98% | 56,840 psi | 89% | 2949 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 56,405 psi | 88% | 2923 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,069 psi | 83% | 2897 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,202 psi | 88% | 2959 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,245 psi | 87% | 2999 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 56% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,507 psi | 89% | 2907 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,071 psi | 86% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,593 psi | 87% | 2884 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,013 psi | 86% | 2858 fps | 97.9% |
| IMR 4350 | <<locked>> | 98% | 54,433 psi | 85% | 2894 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,144 psi | 88% | 2904 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,792 psi | 78% | 2861 fps | 99.3% |
| IMR 4895 | <<locked>> | 88% | 55,492 psi | 87% | 2936 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,737 psi | 86% | 2861 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,811 psi | 87% | 2887 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,259 psi | 87% | 2838 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,217 psi | 88% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,419 psi | 87% | 2894 fps | 99% |
| Lovex S070 | <<locked>> | 98% | 56,550 psi | 89% | 2930 fps | 98.4% |
| Norma 201 | <<locked>> | 86% | 54,650 psi | 86% | 2858 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,172 psi | 86% | 2858 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,782 psi | 89% | 2943 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,042 psi | 86% | 2943 fps | 96.2% |
| Norma URP | <<locked>> | 98% | 54,592 psi | 86% | 2953 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 57,595 psi | 90% | 2972 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3009 fps | 99% |
| Ramshot TAC | <<locked>> | 84% | 55,085 psi | 86% | 2881 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,621 psi | 86% | 2897 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,593 psi | 87% | 2864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 56% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,216 psi | 87% | 2894 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,520 psi | 85% | 2972 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,041 psi | 85% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,259 psi | 87% | 2989 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,737 psi | 86% | 3018 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 55,622 psi | 87% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,259 psi | 87% | 2858 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,580 psi | 90% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,609 psi | 90% | 2923 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,419 psi | 87% | 2894 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,811 psi | 87% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,217 psi | 88% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,550 psi | 89% | 2930 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,724 psi | 87% | 2953 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,406 psi | 90% | 2917 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,201 psi | 85% | 2884 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,072 psi | 88% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,478 psi | 89% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,782 psi | 87% | 2848 fps | 98% |
| Somchem S321 | <<locked>> | 82% | 56,173 psi | 88% | 2897 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,419 psi | 87% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,695 psi | 89% | 2904 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,375 psi | 85% | 2887 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2956 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,892 psi | 77% | 2835 fps | 96.2% |
| Unknown powder | <<locked>> | 96% | 55,666 psi | 87% | 2963 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 82% | 54,752 psi | 86% | 2743 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,738 psi | 87% | 2776 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,940 psi | 86% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,926 psi | 86% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,724 psi | 87% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,318 psi | 88% | 2936 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 54,360 psi | 85% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,534 psi | 85% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,362 psi | 88% | 2979 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,788 psi | 70% | 2835 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,392 psi | 90% | 2927 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,028 psi | 88% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,391 psi | 88% | 2989 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,477 psi | 57% | 2766 fps | 99.1% |
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% | 50,241 psi | 79% | 2713 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,960 psi | 67% | 2641 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,515 psi | 76% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,515 psi | 76% | 2779 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,759 psi | 72% | 2671 fps | 95.1% |
| Accurate 3100 | <<locked>> | 98% | 39,914 psi | 63% | 2674 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 40,640 psi | 64% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,287 psi | 54% | 2566 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 46,209 psi | 72% | 2749 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 39,349 psi | 62% | 2598 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,269 psi | 76% | 2756 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,878 psi | 77% | 2740 fps | 100% |
| Alliant Power Pro 2000-MR | 55.2 gr | 80% | 42,206 psi | 66% | 2789 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,160 psi | 61% | 2625 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,901 psi | 66% | 2687 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,447 psi | 54% | 2579 fps | 95.7% |
| Alliant Reloder-17 | 54.4 gr | 80% | 33,881 psi | 53% | 2595 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,791 psi | 47% | 2480 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,985 psi | 58% | 2730 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,629 psi | 72% | 2759 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 38,899 psi | 61% | 2628 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 44,889 psi | 70% | 2703 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,864 psi | 78% | 2743 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,384 psi | 74% | 2782 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,460 psi | 82% | 2933 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 51,343 psi | 80% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,508 psi | 62% | 2628 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 86% | 42,844 psi | 67% | 2749 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 92% | 47,268 psi | 74% | 2785 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 46,659 psi | 73% | 2762 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,704 psi | 47% | 2421 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,205 psi | 63% | 2684 fps | 99.2% |
| Hodgdon Superformance | 64.6 gr | 90% | 44,614 psi | 70% | 2808 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 42% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,423 psi | 65% | 2648 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,612 psi | 67% | 2687 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,464 psi | 60% | 2572 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 43,279 psi | 68% | 2644 fps | 95.3% |
| IMR 4350 | <<locked>> | 92% | 45,295 psi | 71% | 2733 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,830 psi | 69% | 2687 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 34,185 psi | 54% | 2546 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 42,946 psi | 67% | 2720 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 48,269 psi | 76% | 2756 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,672 psi | 72% | 2733 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,064 psi | 72% | 2687 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 41,278 psi | 65% | 2638 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 38,392 psi | 60% | 2579 fps | 95.4% |
| Lovex S070 | <<locked>> | 88% | 41,437 psi | 65% | 2664 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 45,324 psi | 71% | 2703 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 45,716 psi | 72% | 2710 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,292 psi | 65% | 2674 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 51,532 psi | 81% | 2884 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 34,505 psi | 54% | 2566 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 40,944 psi | 64% | 2690 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 41,031 psi | 64% | 2720 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 48,298 psi | 76% | 2769 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,979 psi | 75% | 2789 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,040 psi | 82% | 2805 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 42% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,958 psi | 63% | 2612 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,367 psi | 70% | 2795 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,056 psi | 56% | 2661 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,026 psi | 53% | 2582 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,347 psi | 57% | 2644 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 49,255 psi | 77% | 2740 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,221 psi | 68% | 2657 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 36,622 psi | 57% | 2572 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 44,889 psi | 70% | 2703 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,392 psi | 60% | 2579 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,672 psi | 72% | 2733 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,278 psi | 65% | 2638 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 41,437 psi | 65% | 2664 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,449 psi | 59% | 2618 fps | 97.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,702 psi | 73% | 2743 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,730 psi | 70% | 2720 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,543 psi | 73% | 2651 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,827 psi | 61% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,975 psi | 67% | 2628 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 52,504 psi | 82% | 2841 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,238 psi | 72% | 2654 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,499 psi | 73% | 2740 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 37,333 psi | 59% | 2575 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 27,137 psi | 43% | 2405 fps | 96% |
| Somchem S385 | <<locked>> | 98% | 45,818 psi | 72% | 2779 fps | 95.4% |
| Unknown powder | <<locked>> | 84% | 37,536 psi | 59% | 2628 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 51,329 psi | 80% | 2697 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,903 psi | 69% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,743 psi | 67% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,685 psi | 67% | 2635 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,908 psi | 50% | 2431 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 82% | 35,157 psi | 55% | 2546 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 50,923 psi | 80% | 2812 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,395 psi | 66% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,737 psi | 56% | 2592 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 32,256 psi | 51% | 2562 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,502 psi | 49% | 2438 fps | 96.6% |
| Winchester 748 | <<locked>> | 80% | 52,272 psi | 82% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,844 psi | 67% | 2749 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,037 psi | 47% | 2566 fps | 96.1% |
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 119 powders for .300 WSM loaded with the .308 | 165gr | RWS Speed Tip Professional. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,775 fps to 3,031 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 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 1:12.0 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 165gr | RWS Speed Tip Professional they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Alliant Reloder-25 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.