Load Specifications
Load data in caliber 7 mm WSM with .284 | 150gr | Swift Scirocco bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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>> | 82% | 57,696 psi | 90% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,969 psi | 86% | 2844 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 2953 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,636 psi | 86% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,550 psi | 87% | 2943 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,869 psi | 88% | 3041 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 54,491 psi | 85% | 2861 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,463 psi | 88% | 2992 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 54,273 psi | 85% | 2986 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,753 psi | 89% | 2989 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,405 psi | 87% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,564 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,434 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,696 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,985 psi | 88% | 2979 fps | 98.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3041 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,186 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,833 psi | 73% | 2897 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,346 psi | 85% | 3054 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2966 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 56,347 psi | 88% | 2900 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3041 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 55,666 psi | 87% | 2894 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,441 psi | 73% | 2835 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 84% | 56,594 psi | 89% | 2923 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,969 psi | 85% | 2940 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 57,319 psi | 90% | 2956 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 96% | 54,128 psi | 85% | 2927 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,985 psi | 89% | 2972 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,623 psi | 89% | 2920 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,847 psi | 72% | 2936 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 88% | 54,172 psi | 85% | 2976 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,363 psi | 90% | 2894 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,246 psi | 88% | 2881 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 56,637 psi | 89% | 2927 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,058 psi | 89% | 2917 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 56,173 psi | 88% | 2936 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,985 psi | 89% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,738 psi | 87% | 2917 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3022 fps | 97.8% |
| Lovex S062 | <<locked>> | 84% | 57,609 psi | 90% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,522 psi | 90% | 2917 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,332 psi | 87% | 2907 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,761 psi | 75% | 2802 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 54,853 psi | 86% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,667 psi | 90% | 2982 fps | 98.8% |
| Norma MRP | <<locked>> | 98% | 57,043 psi | 89% | 3071 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 54,302 psi | 85% | 2930 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,695 psi | 87% | 2920 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,753 psi | 87% | 3038 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 92% | 56,652 psi | 89% | 2986 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,024 psi | 78% | 2910 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 59% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,376 psi | 88% | 2904 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,319 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,405 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,954 psi | 85% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,861 psi | 72% | 2930 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 56,173 psi | 88% | 2851 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,492 psi | 89% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,549 psi | 85% | 2904 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 55,274 psi | 87% | 2966 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 55,666 psi | 87% | 2894 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,522 psi | 90% | 2917 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,609 psi | 90% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,332 psi | 87% | 2907 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,404 psi | 85% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,203 psi | 90% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,159 psi | 90% | 2871 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,810 psi | 86% | 2963 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 56,304 psi | 88% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,376 psi | 88% | 2900 fps | 97.1% |
| Somchem S365 | <<locked>> | 94% | 57,537 psi | 90% | 2982 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,753 psi | 87% | 2940 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 82% | 56,608 psi | 89% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,652 psi | 89% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,653 psi | 90% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,202 psi | 88% | 2920 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2917 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 54,984 psi | 86% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,376 psi | 87% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,579 psi | 89% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,116 psi | 90% | 3061 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2904 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,854 psi | 88% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,259 psi | 85% | 2943 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,748 psi | 78% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,869 psi | 88% | 2933 fps | 98.6% |
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% | 54,288 psi | 85% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,605 psi | 81% | 2789 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 33,373 psi | 52% | 2503 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,488 psi | 81% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,552 psi | 62% | 2661 fps | 99% |
| Accurate MAGPRO | <<locked>> | 94% | 48,399 psi | 76% | 2910 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,254 psi | 76% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,683 psi | 64% | 2697 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 47,297 psi | 74% | 2861 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,843 psi | 64% | 2697 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,776 psi | 76% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,156 psi | 82% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,174 psi | 60% | 2667 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,700 psi | 68% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,466 psi | 63% | 2690 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,901 psi | 64% | 2746 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,253 psi | 44% | 2425 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,937 psi | 50% | 2546 fps | 95.6% |
| Alliant Reloder-26 | 56.2 gr | 80% | 30,153 psi | 47% | 2533 fps | 95.6% |
| Bofors RP15 | <<locked>> | 92% | 40,350 psi | 63% | 2733 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 49,501 psi | 78% | 2799 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,901 psi | 64% | 2746 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 43,207 psi | 68% | 2671 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 98% | 43,439 psi | 68% | 2772 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 49,574 psi | 78% | 2808 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 41,495 psi | 65% | 2707 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,309 psi | 69% | 2726 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 47,442 psi | 74% | 2808 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,632 psi | 78% | 2851 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,868 psi | 56% | 2559 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,306 psi | 63% | 2808 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 40,408 psi | 63% | 2720 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 43% | 1621 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,778 psi | 80% | 2795 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,837 psi | 83% | 2825 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 38,841 psi | 61% | 2598 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,686 psi | 70% | 2703 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 38,014 psi | 60% | 2612 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 53,505 psi | 84% | 2884 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,224 psi | 72% | 2749 fps | 95% |
| IMR 7828 SSC | <<locked>> | 94% | 45,208 psi | 71% | 2831 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 51,039 psi | 80% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,279 psi | 66% | 2654 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 40,379 psi | 63% | 2631 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 32,518 psi | 51% | 2480 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,488 psi | 81% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,191 psi | 65% | 2687 fps | 95.2% |
| Norma MRP | 58.7 gr | 86% | 37,463 psi | 59% | 2697 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 39,117 psi | 61% | 2651 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 52,040 psi | 82% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,150 psi | 71% | 2841 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,000 psi | 60% | 2638 fps | 97.1% |
| Ramshot Magnum | <<locked>> | 92% | 37,420 psi | 59% | 2654 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 44% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,545 psi | 78% | 2795 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,412 psi | 73% | 2848 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,320 psi | 62% | 2677 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,956 psi | 59% | 2687 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,173 psi | 58% | 2723 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,721 psi | 83% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,470 psi | 73% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,020 psi | 71% | 2736 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 39,639 psi | 62% | 2674 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 43,207 psi | 68% | 2671 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,279 psi | 66% | 2654 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 51,039 psi | 80% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,379 psi | 63% | 2631 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,674 psi | 75% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,587 psi | 75% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,278 psi | 65% | 2595 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,262 psi | 62% | 2667 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,804 psi | 73% | 2743 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,298 psi | 77% | 2782 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 35,679 psi | 56% | 2608 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,681 psi | 59% | 2602 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 53,301 psi | 84% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,214 psi | 83% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,556 psi | 70% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,567 psi | 64% | 2651 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 39,581 psi | 62% | 2635 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,430 psi | 81% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,943 psi | 63% | 2651 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,357 psi | 49% | 2503 fps | 97.3% |
| Vihtavuori N560 | 62.8 gr | 92% | 46,485 psi | 73% | 2871 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 45,585 psi | 71% | 2841 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,653 psi | 62% | 2618 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 41,495 psi | 65% | 2707 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,918 psi | 39% | 2395 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,424 psi | 66% | 2700 fps | 95.8% |
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 89 powders for 7 mm WSM loaded with the .284 | 150gr | Swift Scirocco. Norma MRP delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,811 fps to 3,071 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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 Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm WSM with the .284 | 150gr | Swift Scirocco 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.