Load Specifications
Load data in caliber .300 WSM with .308 | 139gr | RWS Evolution Green 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, ReloadSwiss RS 60 and ReloadSwiss RS 52.
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>> | 88% | 55,521 psi | 87% | 3041 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,925 psi | 85% | 3061 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,855 psi | 89% | 3104 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,128 psi | 85% | 3110 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 56,449 psi | 88% | 3143 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,110 psi | 77% | 3094 fps | 97.7% |
| Accurate LT-30 | <<locked>> | 82% | 54,940 psi | 86% | 2982 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,347 psi | 87% | 3012 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,839 psi | 86% | 3133 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 96% | 56,028 psi | 88% | 3130 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 56,304 psi | 88% | 3117 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 57,653 psi | 90% | 3146 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,983 psi | 85% | 3071 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,593 psi | 87% | 3205 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,563 psi | 86% | 3251 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,419 psi | 87% | 3153 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,216 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 56,202 psi | 88% | 3176 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 3104 fps | 97.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3278 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,520 psi | 85% | 2979 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,984 psi | 86% | 3146 fps | 98.8% |
| Bofors RP3 | <<locked>> | 96% | 55,941 psi | 88% | 3166 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,014 psi | 88% | 3074 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,855 psi | 89% | 3173 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,955 psi | 86% | 3215 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 88% | 57,450 psi | 90% | 3133 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,550 psi | 87% | 3114 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 57,580 psi | 90% | 3179 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 98% | 54,781 psi | 86% | 3189 fps | 96.2% |
| Hodgdon H4198 | <<locked>> | 82% | 56,956 psi | 89% | 3038 fps | 100% |
| Hodgdon H4895 | <<locked>> | 90% | 55,361 psi | 87% | 3146 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,396 psi | 70% | 2976 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,302 psi | 85% | 3173 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,722 psi | 54% | 1919 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 55,535 psi | 87% | 3130 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 56,463 psi | 88% | 3159 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 54,244 psi | 85% | 3094 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 98% | 57,682 psi | 90% | 3117 fps | 96.6% |
| IMR 4198 | <<locked>> | 84% | 55,738 psi | 87% | 3012 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,158 psi | 86% | 3104 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,292 psi | 65% | 2920 fps | 95.9% |
| IMR 4895 | <<locked>> | 94% | 57,624 psi | 90% | 3209 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 90% | 57,653 psi | 90% | 3146 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,027 psi | 85% | 3071 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,128 psi | 85% | 3110 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,868 psi | 86% | 3061 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 54,665 psi | 86% | 3107 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 3094 fps | 97.3% |
| Norma 201 | <<locked>> | 92% | 56,884 psi | 89% | 3130 fps | 100% |
| Norma 202 | <<locked>> | 92% | 57,435 psi | 90% | 3136 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,317 psi | 87% | 3159 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 48,892 psi | 77% | 3087 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 94% | 56,202 psi | 88% | 3189 fps | 99.5% |
| Ramshot TAC | <<locked>> | 88% | 54,766 psi | 86% | 3100 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 57,711 psi | 90% | 3179 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,419 psi | 87% | 3091 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,969 psi | 55% | 1962 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 57,305 psi | 90% | 3130 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,491 psi | 85% | 3097 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,695 psi | 89% | 3251 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 56,289 psi | 88% | 3284 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 3117 fps | 97.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,792 psi | 78% | 3140 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 90% | 57,624 psi | 90% | 3117 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 57,203 psi | 90% | 3127 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 55,535 psi | 87% | 3153 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,998 psi | 85% | 3094 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,128 psi | 85% | 3110 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,665 psi | 86% | 3107 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 57,334 psi | 90% | 3097 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,579 psi | 89% | 3123 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,056 psi | 85% | 3163 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,579 psi | 89% | 3081 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,594 psi | 89% | 3133 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 57,116 psi | 90% | 3163 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,419 psi | 87% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,405 psi | 87% | 3018 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3041 fps | 95.9% |
| Somchem S321 | <<locked>> | 86% | 55,535 psi | 87% | 3127 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,491 psi | 85% | 3018 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,202 psi | 88% | 3127 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 56,057 psi | 88% | 3153 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,366 psi | 68% | 3028 fps | 99.3% |
| Unknown powderᴾ | <<locked>> | 100% | 53,708 psi | 84% | 3159 fps | 97.9% |
| Vihtavuori N120 | <<locked>> | 82% | 56,188 psi | 88% | 2943 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 57,479 psi | 90% | 3028 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,621 psi | 86% | 3002 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,681 psi | 89% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,188 psi | 90% | 3104 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 3025 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 3130 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 88% | 57,435 psi | 90% | 3153 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,145 psi | 90% | 3133 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3182 fps | 98.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,663 psi | 83% | 3077 fps | 99.6% |
| Winchester 748 | <<locked>> | 86% | 55,056 psi | 86% | 3153 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,781 psi | 86% | 3189 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,752 psi | 86% | 3136 fps | 99.7% |
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% | 43,149 psi | 68% | 2841 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,021 psi | 74% | 2946 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,201 psi | 55% | 2726 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,625 psi | 64% | 2867 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 33,344 psi | 52% | 2703 fps | 98.7% |
| Accurate 4350 | <<locked>> | 94% | 39,494 psi | 62% | 2900 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 51,750 psi | 81% | 2936 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,127 psi | 82% | 2959 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,653 psi | 62% | 2838 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 38,363 psi | 60% | 2785 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 52,373 psi | 82% | 3058 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,756 psi | 65% | 2858 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 41,075 psi | 64% | 2864 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,544 psi | 76% | 3081 fps | 99% |
| Alliant Power Pro 2000-MR | 58.1 gr | 84% | 41,336 psi | 65% | 2979 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,909 psi | 52% | 2687 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,834 psi | 77% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 37,913 psi | 59% | 2815 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 39,987 psi | 63% | 2917 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,751 psi | 54% | 2812 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,068 psi | 80% | 2927 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,856 psi | 61% | 2831 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 32,111 psi | 50% | 2680 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,700 psi | 68% | 2858 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,103 psi | 63% | 2867 fps | 98.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,237 psi | 69% | 3015 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 80% | 44,309 psi | 69% | 2917 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,808 psi | 81% | 3054 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,857 psi | 64% | 2871 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 50,966 psi | 80% | 3120 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 53,621 psi | 84% | 2989 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 39,943 psi | 63% | 2851 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,287 psi | 54% | 2743 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,736 psi | 53% | 2746 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,657 psi | 40% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,578 psi | 56% | 2730 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 35,665 psi | 56% | 2782 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 37,449 psi | 59% | 2759 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 51,068 psi | 80% | 3002 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 49,516 psi | 78% | 2920 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,040 psi | 82% | 3048 fps | 95.3% |
| IMR 4831 | <<locked>> | 98% | 38,754 psi | 61% | 2864 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 36,289 psi | 57% | 2789 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 41,756 psi | 65% | 2858 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 46,891 psi | 73% | 2953 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 38,159 psi | 60% | 2815 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 40,263 psi | 63% | 2785 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 34,969 psi | 55% | 2713 fps | 96.7% |
| Lovex S065 | <<locked>> | 94% | 44,744 psi | 70% | 2920 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 38,740 psi | 61% | 2792 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 39,044 psi | 61% | 2812 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 34,853 psi | 55% | 2743 fps | 95.1% |
| Norma URP | <<locked>> | 94% | 39,914 psi | 63% | 2904 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 82% | 36,941 psi | 58% | 2812 fps | 95.5% |
| Ramshot TAC | <<locked>> | 82% | 44,744 psi | 70% | 2913 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,031 psi | 64% | 2874 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,310 psi | 71% | 2910 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,788 psi | 40% | 1755 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,949 psi | 74% | 2956 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,703 psi | 75% | 2976 fps | 95% |
| ReloadSwiss RS 52 | 53.6 gr | 80% | 36,782 psi | 58% | 2854 fps | 95% |
| ReloadSwiss RS 60 | 54.5 gr | 80% | 30,356 psi | 48% | 2694 fps | 95.8% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,525 psi | 67% | 2989 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 43,424 psi | 68% | 3002 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 42,308 psi | 66% | 2851 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 36,883 psi | 58% | 2740 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 34,519 psi | 54% | 2736 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 44,744 psi | 70% | 2920 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,159 psi | 60% | 2815 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 34,969 psi | 55% | 2713 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,806 psi | 78% | 2976 fps | 99.3% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,823 psi | 83% | 3068 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,085 psi | 57% | 2799 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,719 psi | 78% | 2976 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 42,627 psi | 67% | 2877 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,261 psi | 60% | 2799 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,451 psi | 63% | 2762 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,272 psi | 52% | 2612 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,024 psi | 80% | 2979 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 45,107 psi | 71% | 2943 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 39,958 psi | 63% | 2766 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 39,552 psi | 62% | 2818 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 33,475 psi | 52% | 2694 fps | 95.1% |
| Somchem S365 | <<locked>> | 90% | 31,125 psi | 49% | 2720 fps | 95.5% |
| Unknown powder | <<locked>> | 94% | 43,903 psi | 69% | 2976 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 52,881 psi | 83% | 2897 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 44,933 psi | 70% | 2835 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,956 psi | 59% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,911 psi | 56% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,361 psi | 57% | 2730 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 30,197 psi | 47% | 2589 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 92% | 41,191 psi | 65% | 2887 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 43,961 psi | 69% | 2917 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 36,085 psi | 57% | 2746 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 92% | 41,524 psi | 65% | 2936 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,041 psi | 55% | 2713 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 44,411 psi | 70% | 2966 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 50,966 psi | 80% | 3120 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,355 psi | 74% | 3009 fps | 98.9% |
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 112 powders for .300 WSM loaded with the .308 | 139gr | RWS Evolution Green. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,284 fps. Accurate 4350 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 52 rank at the top here: for .300 WSM with the .308 | 139gr | RWS Evolution Green they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-23, Alliant Reloder-26, Hodgdon H4350 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.