Load Specifications
Load data in caliber .300 WSM with .308 | 150gr | Nosler Solid Base bullet and 98 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, ReloadSwiss RS 60 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.
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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% | 55,477 psi | 87% | 2936 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,464 psi | 90% | 3015 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,273 psi | 85% | 2963 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,014 psi | 88% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,217 psi | 90% | 3012 fps | 96.9% |
| Accurate 4064 | <<locked>> | 90% | 54,462 psi | 85% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,375 psi | 85% | 3091 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 86% | 54,723 psi | 86% | 3041 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 55,637 psi | 87% | 3038 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,188 psi | 90% | 3045 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,621 psi | 86% | 2972 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,491 psi | 85% | 3163 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,709 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,362 psi | 88% | 3087 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3150 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,869 psi | 89% | 3192 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,653 psi | 62% | 2861 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,469 psi | 70% | 3031 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,447 psi | 85% | 3051 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 56,449 psi | 88% | 3081 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,594 psi | 89% | 3048 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,259 psi | 87% | 2972 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,753 psi | 89% | 3074 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,984 psi | 86% | 3120 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 92% | 57,493 psi | 90% | 3094 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 57,188 psi | 90% | 3143 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 96% | 57,711 psi | 90% | 3104 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 55,332 psi | 87% | 3054 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,663 psi | 81% | 3018 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,708 psi | 86% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,172 psi | 85% | 3117 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 56% | 1883 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,362 psi | 88% | 3054 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,187 psi | 86% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,216 psi | 87% | 3022 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,129 psi | 86% | 2999 fps | 97.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 3068 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,042 psi | 86% | 3025 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 3081 fps | 99.4% |
| IMR 4895 | <<locked>> | 88% | 54,186 psi | 85% | 3061 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 57,188 psi | 90% | 3045 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,493 psi | 90% | 3028 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,607 psi | 86% | 3018 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,522 psi | 90% | 3018 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,998 psi | 86% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,447 psi | 85% | 3018 fps | 98.4% |
| Lovex S070 | <<locked>> | 98% | 55,230 psi | 87% | 3048 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 56,797 psi | 89% | 3035 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,551 psi | 90% | 3041 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,535 psi | 87% | 3071 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3120 fps | 96% |
| Norma URPᴾ | <<locked>> | 100% | 56,927 psi | 89% | 3136 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 56,289 psi | 88% | 3100 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3127 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 57,682 psi | 90% | 3064 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,319 psi | 90% | 3084 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,433 psi | 85% | 2989 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,969 psi | 56% | 1926 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,405 psi | 88% | 3022 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,230 psi | 85% | 3015 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,014 psi | 89% | 3159 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,652 psi | 89% | 3192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,824 psi | 84% | 3110 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 3205 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 54,549 psi | 85% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,363 psi | 90% | 3035 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,304 psi | 88% | 3071 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,594 psi | 89% | 3048 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,447 psi | 85% | 3018 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,607 psi | 86% | 3018 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,998 psi | 86% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,230 psi | 87% | 3048 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,491 psi | 85% | 3077 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,985 psi | 88% | 3038 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,695 psi | 89% | 3064 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,911 psi | 86% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,317 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,578 psi | 86% | 2963 fps | 97.2% |
| Somchem S321 | <<locked>> | 82% | 54,897 psi | 86% | 3022 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,595 psi | 90% | 2969 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,535 psi | 87% | 3028 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 56,492 psi | 89% | 3068 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 3077 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,578 psi | 86% | 2887 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,158 psi | 86% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,217 psi | 90% | 2999 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,563 psi | 86% | 2966 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,534 psi | 85% | 2992 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,956 psi | 88% | 3077 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 57,740 psi | 90% | 3045 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,144 psi | 88% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,897 psi | 86% | 3077 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,569 psi | 68% | 2946 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,217 psi | 88% | 3051 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,114 psi | 85% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,450 psi | 90% | 3150 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,520 psi | 56% | 2851 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,637 psi | 89% | 3071 fps | 100% |
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% | 48,994 psi | 77% | 2841 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,824 psi | 84% | 2963 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,785 psi | 65% | 2759 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,066 psi | 77% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,053 psi | 78% | 2890 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 39,523 psi | 62% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,723 psi | 56% | 2726 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 45,252 psi | 71% | 2871 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,479 psi | 60% | 2710 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,340 psi | 74% | 2884 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,688 psi | 75% | 2871 fps | 100% |
| Alliant Power Pro 2000-MR | 58 gr | 80% | 41,118 psi | 64% | 2894 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,130 psi | 60% | 2733 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,973 psi | 64% | 2799 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,839 psi | 56% | 2740 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,025 psi | 52% | 2690 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,866 psi | 52% | 2684 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,624 psi | 61% | 2890 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,440 psi | 70% | 2871 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 37,869 psi | 59% | 2736 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 49,893 psi | 78% | 2930 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,081 psi | 77% | 2871 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,195 psi | 72% | 2900 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,155 psi | 80% | 3058 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,696 psi | 61% | 2740 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 46,804 psi | 73% | 2959 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 50,705 psi | 79% | 2982 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 45,687 psi | 72% | 2884 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,908 psi | 48% | 2572 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,684 psi | 65% | 2851 fps | 99% |
| Hodgdon Superformance | 69.5 gr | 92% | 46,949 psi | 74% | 2982 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,484 psi | 42% | 1683 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,772 psi | 69% | 2831 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 45,469 psi | 71% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,364 psi | 63% | 2746 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,687 psi | 72% | 2825 fps | 95.2% |
| IMR 4350 | <<locked>> | 94% | 47,123 psi | 74% | 2900 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,658 psi | 72% | 2854 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 36,985 psi | 58% | 2740 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 41,959 psi | 66% | 2831 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,340 psi | 74% | 2884 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 53,853 psi | 84% | 2976 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,599 psi | 70% | 2851 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,150 psi | 71% | 2805 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 40,321 psi | 63% | 2753 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 39,929 psi | 63% | 2740 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 45,861 psi | 72% | 2881 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,280 psi | 69% | 2822 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,643 psi | 70% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,335 psi | 63% | 2789 fps | 98% |
| Norma 204 | <<locked>> | 98% | 53,882 psi | 84% | 3058 fps | 95.1% |
| Norma URP | <<locked>> | 86% | 35,824 psi | 56% | 2723 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,856 psi | 62% | 2795 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 42,728 psi | 67% | 2884 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 47,369 psi | 74% | 2887 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,804 psi | 73% | 2907 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,140 psi | 80% | 2933 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 42% | 1719 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,098 psi | 83% | 2972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,498 psi | 70% | 2835 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,265 psi | 68% | 2910 fps | 98.1% |
| ReloadSwiss RS 60 | 57.2 gr | 80% | 35,157 psi | 55% | 2766 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,985 psi | 60% | 2802 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,698 psi | 64% | 2874 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 48,356 psi | 76% | 2871 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,134 psi | 66% | 2769 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 35,592 psi | 56% | 2677 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 49,893 psi | 78% | 2930 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,929 psi | 63% | 2740 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,599 psi | 70% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,321 psi | 63% | 2753 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 45,861 psi | 72% | 2881 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,593 psi | 57% | 2726 fps | 96.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,730 psi | 72% | 2861 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,816 psi | 69% | 2838 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,527 psi | 71% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,927 psi | 59% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,846 psi | 70% | 2792 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 51,213 psi | 80% | 2963 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,237 psi | 71% | 2776 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,223 psi | 71% | 2851 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 36,376 psi | 57% | 2684 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 28,282 psi | 44% | 2552 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 51,329 psi | 80% | 2838 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,876 psi | 72% | 2769 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,640 psi | 65% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,264 psi | 66% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,592 psi | 54% | 2615 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,579 psi | 59% | 2730 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 47,500 psi | 74% | 2877 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,785 psi | 64% | 2749 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 37,086 psi | 58% | 2730 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 33,272 psi | 52% | 2707 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,690 psi | 48% | 2526 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 47,108 psi | 74% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 47,007 psi | 74% | 2966 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,198 psi | 49% | 2710 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,381 psi | 68% | 2841 fps | 99% |
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 98 powders for .300 WSM loaded with the .308 | 150gr | Nosler Solid Base. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,205 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 98 of the 98 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 150.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, ReloadSwiss RS 60, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 150gr | Nosler Solid Base they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.