Load Specifications
Load data in caliber .300 WSM with .308 | 150gr | Nosler Partition bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4064, Alliant Power Pro 2000-MR 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% | 55,782 psi | 87% | 2943 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,592 psi | 86% | 2966 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,333 psi | 88% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,450 psi | 90% | 3015 fps | 97% |
| Accurate 4064 | <<locked>> | 90% | 54,795 psi | 86% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,621 psi | 86% | 3097 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 55,042 psi | 86% | 3048 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 55,912 psi | 88% | 3045 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,493 psi | 90% | 3051 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,694 psi | 86% | 2972 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,752 psi | 86% | 3169 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,999 psi | 88% | 3068 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,652 psi | 89% | 3094 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3159 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,159 psi | 90% | 3196 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,030 psi | 63% | 2871 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,846 psi | 70% | 3038 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,708 psi | 86% | 3058 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 57,029 psi | 89% | 3087 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,811 psi | 89% | 3051 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,506 psi | 87% | 2979 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,043 psi | 89% | 3081 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,288 psi | 87% | 3127 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 92% | 57,740 psi | 90% | 3100 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 98% | 57,392 psi | 90% | 3150 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 94% | 54,331 psi | 85% | 3048 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 86% | 55,579 psi | 87% | 3058 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,895 psi | 81% | 3022 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,984 psi | 86% | 3091 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,592 psi | 86% | 3127 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,563 psi | 56% | 1883 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,666 psi | 89% | 3058 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,579 psi | 87% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,477 psi | 87% | 3028 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,376 psi | 87% | 3002 fps | 97.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,188 psi | 90% | 3077 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,332 psi | 87% | 3031 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3087 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,433 psi | 85% | 3068 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 57,493 psi | 90% | 3051 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,926 psi | 86% | 3022 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,534 psi | 85% | 2972 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 55,230 psi | 87% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,665 psi | 86% | 3025 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 55,448 psi | 87% | 3058 fps | 97.7% |
| Norma 201 | <<locked>> | 88% | 57,072 psi | 89% | 3041 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,230 psi | 85% | 2992 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,825 psi | 87% | 3077 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 57,188 psi | 90% | 3140 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 56,536 psi | 89% | 3104 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,072 psi | 88% | 3136 fps | 98.4% |
| Ramshot TAC | <<locked>> | 84% | 54,201 psi | 85% | 3012 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,580 psi | 90% | 3091 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,708 psi | 86% | 2995 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,955 psi | 56% | 1926 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,739 psi | 89% | 3028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,462 psi | 85% | 3022 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,305 psi | 90% | 3166 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,956 psi | 89% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,331 psi | 85% | 3117 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,983 psi | 85% | 3146 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 54,636 psi | 86% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,682 psi | 90% | 3041 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,579 psi | 89% | 3074 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,811 psi | 89% | 3051 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,665 psi | 86% | 3025 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,926 psi | 86% | 3022 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,230 psi | 87% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,448 psi | 87% | 3058 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,810 psi | 86% | 3084 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,478 psi | 89% | 3048 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,956 psi | 89% | 3071 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,245 psi | 87% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,347 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,027 psi | 86% | 2972 fps | 97.3% |
| Somchem S321 | <<locked>> | 82% | 55,143 psi | 86% | 3028 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,621 psi | 86% | 2927 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,782 psi | 87% | 3035 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 56,768 psi | 89% | 3071 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,619 psi | 81% | 3087 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,897 psi | 86% | 2894 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,492 psi | 87% | 2917 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,537 psi | 90% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,853 psi | 86% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,781 psi | 86% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,188 psi | 88% | 3081 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 54,317 psi | 85% | 2995 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,391 psi | 88% | 3015 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,085 psi | 86% | 3084 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,816 psi | 69% | 2949 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,637 psi | 89% | 3058 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,433 psi | 85% | 3045 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,696 psi | 90% | 3153 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,839 psi | 56% | 2864 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,971 psi | 89% | 3077 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% | 49,327 psi | 77% | 2848 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,148 psi | 66% | 2766 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,124 psi | 77% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,241 psi | 79% | 2897 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,827 psi | 62% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,998 psi | 56% | 2733 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 45,513 psi | 71% | 2877 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,740 psi | 61% | 2717 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,601 psi | 75% | 2890 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,037 psi | 75% | 2877 fps | 100% |
| Alliant Power Pro 2000-MR | 58.3 gr | 80% | 41,379 psi | 65% | 2900 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,392 psi | 60% | 2740 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,234 psi | 65% | 2808 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,882 psi | 56% | 2743 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,083 psi | 52% | 2694 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,140 psi | 49% | 2635 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,769 psi | 61% | 2894 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,715 psi | 70% | 2877 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 38,159 psi | 60% | 2743 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 47,166 psi | 74% | 2881 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,124 psi | 77% | 2874 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,485 psi | 73% | 2907 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,430 psi | 81% | 3064 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,754 psi | 61% | 2740 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 47,036 psi | 74% | 2966 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 92% | 51,169 psi | 80% | 2995 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 45,977 psi | 72% | 2890 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,966 psi | 49% | 2575 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,930 psi | 66% | 2854 fps | 99.1% |
| Hodgdon Superformance | 69.8 gr | 92% | 47,094 psi | 74% | 2989 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 42% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,034 psi | 69% | 2838 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 45,585 psi | 71% | 2884 fps | 100% |
| IMR 4064 | 53.2 gr | 80% | 40,654 psi | 64% | 2753 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,905 psi | 72% | 2831 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 47,340 psi | 74% | 2907 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,905 psi | 72% | 2858 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 34,795 psi | 55% | 2687 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 42,250 psi | 66% | 2841 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,601 psi | 75% | 2890 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,686 psi | 70% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,440 psi | 71% | 2812 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,596 psi | 64% | 2759 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 40,190 psi | 63% | 2746 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 46,093 psi | 72% | 2887 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,585 psi | 70% | 2828 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,918 psi | 70% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,611 psi | 64% | 2795 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 36,085 psi | 57% | 2730 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,074 psi | 63% | 2805 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 42,989 psi | 67% | 2890 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 47,398 psi | 74% | 2887 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,021 psi | 74% | 2910 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,184 psi | 80% | 2933 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,760 psi | 42% | 1722 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,171 psi | 83% | 2972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,744 psi | 70% | 2844 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,294 psi | 68% | 2913 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,215 psi | 55% | 2766 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,218 psi | 60% | 2808 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,930 psi | 64% | 2877 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 48,457 psi | 76% | 2874 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,395 psi | 66% | 2776 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 35,868 psi | 56% | 2684 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 47,166 psi | 74% | 2881 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,190 psi | 63% | 2746 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,686 psi | 70% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,596 psi | 64% | 2759 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 46,093 psi | 72% | 2887 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,666 psi | 57% | 2730 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,774 psi | 72% | 2861 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,874 psi | 69% | 2841 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,847 psi | 72% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,189 psi | 60% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,092 psi | 71% | 2799 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 51,517 psi | 81% | 2972 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,513 psi | 71% | 2782 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,498 psi | 71% | 2861 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 36,651 psi | 57% | 2690 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 28,355 psi | 44% | 2556 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 51,648 psi | 81% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,166 psi | 72% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,930 psi | 66% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,554 psi | 67% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,867 psi | 55% | 2621 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,826 psi | 59% | 2736 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,776 psi | 75% | 2884 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,857 psi | 64% | 2753 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 37,115 psi | 58% | 2733 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 33,504 psi | 53% | 2713 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,879 psi | 48% | 2533 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,427 psi | 74% | 2930 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 47,268 psi | 74% | 2972 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,488 psi | 49% | 2723 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,439 psi | 68% | 2844 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 95 powders for .300 WSM loaded with the .308 | 150gr | Nosler Partition. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,199 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 95 of the 95 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 1:14.5 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. IMR 4064, Alliant Power Pro 2000-MR, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 150gr | Nosler Partition 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.