Load Specifications
Load data in caliber 7 mm WSM with .284 | 145gr | Hasler ARIETE bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 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 2495 | <<locked>> | 84% | 57,638 psi | 90% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,334 psi | 90% | 2913 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 2943 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 54,505 psi | 85% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,709 psi | 87% | 2995 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,363 psi | 90% | 2966 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,288 psi | 87% | 2920 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,956 psi | 89% | 3045 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3035 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,563 psi | 86% | 3045 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,912 psi | 88% | 2943 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,115 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,681 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,302 psi | 85% | 3025 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,289 psi | 88% | 3031 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 3031 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,502 psi | 79% | 2963 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,714 psi | 69% | 2877 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,041 psi | 85% | 3100 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 2949 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 56,681 psi | 89% | 2959 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 3031 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 56,086 psi | 88% | 2946 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,912 psi | 88% | 2995 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 57,174 psi | 90% | 2979 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,767 psi | 87% | 3015 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 92% | 56,101 psi | 88% | 2982 fps | 98.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3022 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,116 psi | 90% | 2976 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,201 psi | 87% | 2966 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,772 psi | 67% | 2907 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 90% | 54,607 psi | 86% | 3031 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 57% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,665 psi | 86% | 2910 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,624 psi | 90% | 2930 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,392 psi | 90% | 2943 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,362 psi | 88% | 2927 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 57,377 psi | 90% | 2982 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,404 psi | 85% | 2920 fps | 99.1% |
| IMR 4831 | <<locked>> | 98% | 57,116 psi | 90% | 2999 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,551 psi | 90% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,275 psi | 88% | 2966 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,130 psi | 88% | 3074 fps | 97.4% |
| Lovex S060 | <<locked>> | 82% | 56,231 psi | 88% | 2890 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,607 psi | 86% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,288 psi | 85% | 2913 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 55,564 psi | 87% | 2956 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,309 psi | 69% | 2785 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 55,999 psi | 88% | 2907 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,623 psi | 89% | 2900 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,361 psi | 87% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,360 psi | 85% | 2976 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 57,029 psi | 89% | 3120 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 54,404 psi | 85% | 2979 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,507 psi | 89% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,101 psi | 88% | 3084 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 94% | 57,159 psi | 90% | 3041 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2992 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 58% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,058 psi | 89% | 2963 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,188 psi | 90% | 3035 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,664 psi | 84% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,622 psi | 87% | 3018 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,404 psi | 85% | 3051 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,757 psi | 67% | 2900 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 84% | 56,695 psi | 89% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,811 psi | 89% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,042 psi | 86% | 2956 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 98% | 55,448 psi | 87% | 3015 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 90% | 56,086 psi | 88% | 2946 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,288 psi | 85% | 2913 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 54,607 psi | 86% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,564 psi | 87% | 2956 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,868 psi | 86% | 2963 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,767 psi | 87% | 2936 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,768 psi | 89% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,462 psi | 85% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,624 psi | 90% | 2920 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,955 psi | 86% | 3009 fps | 98.4% |
| Somchem S335 | <<locked>> | 82% | 56,550 psi | 89% | 2831 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,782 psi | 89% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,753 psi | 89% | 2946 fps | 96.7% |
| Somchem S365 | <<locked>> | 96% | 57,493 psi | 90% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,086 psi | 88% | 2989 fps | 99.1% |
| Unknown powder | <<locked>> | 90% | 55,172 psi | 86% | 2986 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 56,971 psi | 89% | 2812 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,203 psi | 90% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,507 psi | 89% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,824 psi | 86% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,593 psi | 87% | 2953 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,980 psi | 78% | 2877 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 56,333 psi | 88% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,072 psi | 88% | 3005 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 3038 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3054 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,492 psi | 89% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,767 psi | 87% | 3015 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,527 psi | 71% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,462 psi | 85% | 2956 fps | 98.1% |
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 2495 | <<locked>> | 80% | 50,575 psi | 79% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,932 psi | 69% | 2684 fps | 96.7% |
| Accurate 3100 | <<locked>> | 88% | 35,143 psi | 55% | 2589 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 47,993 psi | 75% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,434 psi | 57% | 2638 fps | 98% |
| ADI AR 2206H | <<locked>> | 80% | 53,809 psi | 84% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,730 psi | 72% | 2762 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,700 psi | 68% | 2802 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 47,732 psi | 75% | 2910 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,705 psi | 79% | 2982 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,166 psi | 72% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,269 psi | 77% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,897 psi | 56% | 2654 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,799 psi | 64% | 2785 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,265 psi | 68% | 2795 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,410 psi | 68% | 2841 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,005 psi | 41% | 2392 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,765 psi | 53% | 2635 fps | 95.9% |
| Alliant Reloder-26 | 58.5 gr | 84% | 32,024 psi | 50% | 2631 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 42,786 psi | 67% | 2825 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 46,311 psi | 73% | 2795 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,410 psi | 68% | 2841 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 40,857 psi | 64% | 2664 fps | 96% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,602 psi | 76% | 2877 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 46,659 psi | 73% | 2805 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 42,134 psi | 66% | 2766 fps | 97% |
| Hodgdon H4350 | <<locked>> | 82% | 40,930 psi | 64% | 2700 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,140 psi | 79% | 2897 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,228 psi | 52% | 2543 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,124 psi | 75% | 2851 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,030 psi | 63% | 2835 fps | 95% |
| Hodgdon Superformance | 57.5 gr | 80% | 37,768 psi | 59% | 2700 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 43% | 1644 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,196 psi | 76% | 2805 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,517 psi | 79% | 2828 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,759 psi | 70% | 2736 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,034 psi | 69% | 2707 fps | 97.4% |
| IMR 4350 | <<locked>> | 82% | 38,957 psi | 61% | 2641 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,322 psi | 66% | 2697 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 31,821 psi | 50% | 2507 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 50,531 psi | 79% | 2884 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,763 psi | 78% | 2854 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 48,921 psi | 77% | 2946 fps | 95.7% |
| Lovex S060 | <<locked>> | 80% | 52,765 psi | 83% | 2835 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,138 psi | 75% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,697 psi | 62% | 2641 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 37,971 psi | 60% | 2621 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 33,982 psi | 53% | 2562 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,489 psi | 82% | 2854 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,345 psi | 84% | 2851 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,617 psi | 76% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,208 psi | 69% | 2792 fps | 95.6% |
| Norma MRP | <<locked>> | 88% | 37,217 psi | 58% | 2733 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,593 psi | 57% | 2641 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,124 psi | 77% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 48,138 psi | 75% | 2940 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,404 psi | 55% | 2621 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 94% | 41,553 psi | 65% | 2785 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,862 psi | 73% | 2789 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,476 psi | 84% | 2979 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,424 psi | 68% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,376 psi | 57% | 2657 fps | 97.6% |
| ReloadSwiss RS 70 | 55.2 gr | 80% | 35,476 psi | 56% | 2664 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,740 psi | 62% | 2825 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 80% | 50,053 psi | 78% | 2805 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,627 psi | 68% | 2740 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,225 psi | 76% | 2835 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 42,351 psi | 66% | 2776 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 40,857 psi | 64% | 2664 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,697 psi | 62% | 2641 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 48,138 psi | 75% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,971 psi | 60% | 2621 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,860 psi | 70% | 2795 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,344 psi | 82% | 2881 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,374 psi | 84% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,078 psi | 71% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,754 psi | 61% | 2582 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,959 psi | 66% | 2772 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 53,113 psi | 83% | 2782 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,932 psi | 69% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,748 psi | 78% | 2831 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 32,837 psi | 51% | 2589 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,016 psi | 63% | 2697 fps | 95.8% |
| Unknown powder | <<locked>> | 80% | 39,421 psi | 62% | 2697 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 80% | 50,488 psi | 79% | 2723 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,256 psi | 79% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,864 psi | 78% | 2776 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,608 psi | 59% | 2582 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 39,552 psi | 62% | 2671 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 94% | 40,756 psi | 64% | 2703 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,574 psi | 78% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,943 psi | 63% | 2710 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,514 psi | 45% | 2467 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 98% | 50,328 psi | 79% | 2992 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,217 psi | 58% | 2612 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 42,134 psi | 66% | 2766 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,136 psi | 41% | 2480 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,685 psi | 68% | 2766 fps | 95.7% |
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 107 powders for 7 mm WSM loaded with the .284 | 145gr | Hasler ARIETE. Norma MRP delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,120 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for 7 mm WSM with the .284 | 145gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, ADI AR 2225 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.