Load Specifications
Load data in caliber 7 mm WSM with .284 | 160gr | Winchester FailSafe bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 54,592 psi | 86% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,420 psi | 88% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 57,000 psi | 89% | 2982 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 82% | 54,476 psi | 85% | 2782 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,942 psi | 89% | 2920 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 54,636 psi | 86% | 2923 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 2756 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,640 psi | 64% | 2717 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,246 psi | 90% | 2920 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,622 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,942 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,389 psi | 85% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,565 psi | 89% | 2913 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,375 psi | 85% | 2920 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,288 psi | 87% | 2894 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 2894 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,695 psi | 87% | 2986 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 56,826 psi | 89% | 2881 fps | 95.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 2959 fps | 99.4% |
| Bofors RP3 | <<locked>> | 82% | 56,666 psi | 89% | 2822 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,036 psi | 74% | 2825 fps | 97.5% |
| Bofors RP5 | <<locked>> | 96% | 54,375 psi | 85% | 2920 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 55,637 psi | 87% | 2818 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,256 psi | 79% | 2841 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 56,753 psi | 89% | 2841 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,389 psi | 85% | 2867 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 57,464 psi | 90% | 2884 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 54,853 psi | 86% | 2864 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,377 psi | 90% | 2904 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,276 psi | 90% | 2841 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,140 psi | 79% | 2956 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 54,694 psi | 86% | 2904 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,406 psi | 90% | 2815 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,971 psi | 89% | 2854 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,217 psi | 90% | 2844 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 56,565 psi | 89% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,941 psi | 88% | 2848 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 55,956 psi | 88% | 2956 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 57,740 psi | 90% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,551 psi | 90% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,506 psi | 87% | 2835 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2795 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,244 psi | 85% | 2854 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 36,114 psi | 57% | 2635 fps | 96.2% |
| Norma MRP | <<locked>> | 94% | 54,085 psi | 85% | 2943 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 54,694 psi | 86% | 2851 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,710 psi | 89% | 2979 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 57,319 psi | 90% | 2913 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,897 psi | 86% | 2913 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 59% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,405 psi | 88% | 2828 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,853 psi | 84% | 2871 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,260 psi | 88% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,433 psi | 85% | 2920 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2949 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 56,811 psi | 89% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,897 psi | 86% | 2838 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 55,941 psi | 88% | 2897 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 55,637 psi | 87% | 2818 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,551 psi | 90% | 2838 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,740 psi | 90% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,506 psi | 87% | 2835 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,752 psi | 86% | 2828 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,043 psi | 89% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,971 psi | 89% | 2795 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,492 psi | 87% | 2894 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 56,507 psi | 89% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,594 psi | 89% | 2835 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 54,868 psi | 86% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,594 psi | 89% | 2874 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 86% | 57,740 psi | 90% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,768 psi | 89% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,014 psi | 88% | 2854 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 55,927 psi | 88% | 2854 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,346 psi | 85% | 2874 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,070 psi | 85% | 2933 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2910 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,072 psi | 88% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,607 psi | 86% | 2871 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,565 psi | 89% | 2871 fps | 99.3% |
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 3100 | <<locked>> | 80% | 31,821 psi | 50% | 2395 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 42,859 psi | 67% | 2651 fps | 99.8% |
| Accurate MAGPRO | 63.9 gr | 90% | 46,064 psi | 72% | 2792 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 51,242 psi | 80% | 2733 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,493 psi | 60% | 2579 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 41,814 psi | 66% | 2680 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 42,685 psi | 67% | 2690 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 33,431 psi | 52% | 2530 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,783 psi | 61% | 2582 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,286 psi | 82% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,162 psi | 65% | 2657 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,239 psi | 74% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,421 psi | 60% | 2575 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,972 psi | 61% | 2631 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,647 psi | 48% | 2428 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,458 psi | 48% | 2441 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,040 psi | 52% | 2549 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,476 psi | 84% | 2828 fps | 95% |
| Bofors RP15 | <<locked>> | 88% | 38,479 psi | 60% | 2618 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,968 psi | 83% | 2769 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,060 psi | 64% | 2707 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 38,972 psi | 61% | 2631 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,977 psi | 72% | 2654 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 41,060 psi | 64% | 2661 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 53,055 psi | 83% | 2789 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,599 psi | 70% | 2697 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,297 psi | 74% | 2713 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 44,715 psi | 70% | 2690 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,830 psi | 69% | 2671 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,870 psi | 61% | 2546 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,027 psi | 56% | 2631 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,700 psi | 68% | 2717 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1581 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,940 psi | 85% | 2766 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,539 psi | 65% | 2585 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,471 psi | 74% | 2684 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 41,017 psi | 64% | 2602 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,598 psi | 68% | 2631 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 42,946 psi | 67% | 2717 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 54,288 psi | 85% | 2756 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,092 psi | 71% | 2635 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,424 psi | 68% | 2625 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 31,328 psi | 49% | 2382 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 41,408 psi | 65% | 2621 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 33,866 psi | 53% | 2575 fps | 95.1% |
| Norma MRP | 55.8 gr | 80% | 33,185 psi | 52% | 2516 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,380 psi | 66% | 2641 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 42,627 psi | 67% | 2726 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,147 psi | 64% | 2635 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 35,302 psi | 55% | 2539 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,881 psi | 83% | 2776 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,125 psi | 79% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,757 psi | 67% | 2671 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,031 psi | 64% | 2684 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,331 psi | 55% | 2615 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 80% | 50,024 psi | 78% | 2720 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,511 psi | 67% | 2615 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 37,681 psi | 59% | 2562 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,977 psi | 72% | 2654 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,092 psi | 71% | 2635 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 54,288 psi | 85% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,424 psi | 68% | 2625 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,213 psi | 80% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,285 psi | 79% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,947 psi | 69% | 2579 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,347 psi | 59% | 2556 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 49,951 psi | 78% | 2717 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,325 psi | 73% | 2661 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 38,972 psi | 61% | 2595 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,766 psi | 56% | 2487 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,834 psi | 75% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,613 psi | 68% | 2635 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,288 psi | 55% | 2470 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 43,105 psi | 68% | 2638 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,287 psi | 54% | 2503 fps | 98.9% |
| Vihtavuori N560 | 61.3 gr | 88% | 43,961 psi | 69% | 2749 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 43,700 psi | 68% | 2733 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,656 psi | 67% | 2602 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,802 psi | 70% | 2700 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,137 psi | 43% | 2428 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,391 psi | 59% | 2526 fps | 95.2% |
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 82 powders for 7 mm WSM loaded with the .284 | 160gr | Winchester FailSafe. Winchester StaBALL HD delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,768 fps to 3,031 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 160.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for 7 mm WSM with the .284 | 160gr | Winchester FailSafe 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.