Load Specifications
Load data in caliber 7 mm WSM with .284 | 170gr | Sierra RN Prohunter bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,549 psi | 85% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,014 psi | 88% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,884 psi | 89% | 2907 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 57,101 psi | 89% | 2743 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,666 psi | 89% | 2844 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 54,418 psi | 85% | 2848 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2749 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,366 psi | 68% | 2710 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,869 psi | 89% | 2838 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,201 psi | 85% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,101 psi | 88% | 2828 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,433 psi | 85% | 2844 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,448 psi | 87% | 2812 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2874 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,898 psi | 88% | 2904 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,057 psi | 88% | 2805 fps | 96.6% |
| Bofors RP15 | <<locked>> | 98% | 57,101 psi | 89% | 2884 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2815 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 54,433 psi | 85% | 2844 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 54,853 psi | 86% | 2733 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,722 psi | 84% | 2835 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 86% | 57,653 psi | 90% | 2838 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,797 psi | 89% | 2799 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,288 psi | 85% | 2785 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,043 psi | 89% | 2828 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,087 psi | 89% | 2759 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,664 psi | 84% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,157 psi | 85% | 2818 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 58% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,333 psi | 88% | 2772 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,347 psi | 88% | 2756 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,173 psi | 88% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,477 psi | 87% | 2772 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 55,898 psi | 88% | 2884 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 56,826 psi | 89% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,172 psi | 86% | 2753 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 2772 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,464 psi | 90% | 2828 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2638 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 54,027 psi | 85% | 2864 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,534 psi | 85% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,724 psi | 89% | 2904 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 56,898 psi | 89% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,737 psi | 86% | 2838 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,029 psi | 60% | 1768 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,696 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,028 psi | 88% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,230 psi | 85% | 2835 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2943 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,950 psi | 77% | 2825 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 56,231 psi | 88% | 2733 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,302 psi | 85% | 2759 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 55,796 psi | 87% | 2822 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 54,853 psi | 86% | 2733 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,826 psi | 89% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,172 psi | 86% | 2753 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,667 psi | 90% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,057 psi | 88% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,115 psi | 88% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,361 psi | 87% | 2818 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 55,869 psi | 88% | 2726 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,680 psi | 87% | 2753 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 54,752 psi | 86% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,188 psi | 88% | 2792 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,971 psi | 89% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,217 psi | 88% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,564 psi | 87% | 2772 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,201 psi | 87% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,259 psi | 85% | 2789 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,725 psi | 90% | 2917 fps | 99% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 2897 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2831 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,593 psi | 87% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,201 psi | 85% | 2789 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,927 psi | 89% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,999 psi | 88% | 2789 fps | 99.6% |
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 3100 | <<locked>> | 80% | 34,040 psi | 53% | 2385 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 45,629 psi | 72% | 2625 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,830 psi | 67% | 2661 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 53,722 psi | 84% | 2694 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,029 psi | 60% | 2503 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 38,957 psi | 61% | 2552 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 39,943 psi | 63% | 2572 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 90% | 31,459 psi | 49% | 2418 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,685 psi | 68% | 2631 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,546 psi | 79% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,072 psi | 60% | 2500 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,376 psi | 57% | 2503 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,779 psi | 51% | 2415 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,485 psi | 45% | 2323 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,679 psi | 56% | 2546 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,690 psi | 78% | 2697 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 36,100 psi | 57% | 2497 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 38,638 psi | 61% | 2585 fps | 95.9% |
| Bofors RP5 | <<locked>> | 82% | 36,376 psi | 57% | 2503 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 48,312 psi | 76% | 2628 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,290 psi | 60% | 2539 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 47,195 psi | 74% | 2674 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 49,821 psi | 78% | 2687 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,452 psi | 65% | 2556 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,843 psi | 64% | 2546 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,379 psi | 65% | 2523 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,837 psi | 53% | 2513 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 46,760 psi | 73% | 2700 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 44% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,787 psi | 69% | 2562 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,777 psi | 78% | 2654 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,526 psi | 68% | 2575 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,596 psi | 64% | 2503 fps | 95.2% |
| IMR 7828 SSC | 58.2 gr | 86% | 39,856 psi | 62% | 2585 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,427 psi | 74% | 2605 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,774 psi | 72% | 2598 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,414 psi | 46% | 2267 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 43,830 psi | 69% | 2602 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 31,995 psi | 50% | 2464 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 35,491 psi | 56% | 2510 fps | 97% |
| Norma URP | <<locked>> | 80% | 44,933 psi | 70% | 2618 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,624 psi | 62% | 2595 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 43,627 psi | 68% | 2612 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 32,924 psi | 52% | 2418 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1578 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,722 psi | 84% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,542 psi | 71% | 2648 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,845 psi | 69% | 2664 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,895 psi | 52% | 2490 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,250 psi | 66% | 2694 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 52,794 psi | 83% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,537 psi | 62% | 2490 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 37,405 psi | 59% | 2487 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,312 psi | 76% | 2628 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,427 psi | 74% | 2605 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,774 psi | 72% | 2598 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,998 psi | 85% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,692 psi | 83% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,398 psi | 73% | 2556 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,072 psi | 58% | 2480 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 52,562 psi | 82% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,873 psi | 67% | 2533 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 41,727 psi | 65% | 2572 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,000 psi | 60% | 2470 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 50,343 psi | 79% | 2605 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,166 psi | 72% | 2605 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,851 psi | 51% | 2349 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 45,585 psi | 71% | 2612 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,782 psi | 58% | 2487 fps | 99.7% |
| Vihtavuori N560 | 59.1 gr | 84% | 41,002 psi | 64% | 2618 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 40,930 psi | 64% | 2605 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 43,743 psi | 69% | 2710 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,150 psi | 71% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,413 psi | 74% | 2677 fps | 99.5% |
| Winchester StaBALL HD | 55.7 gr | 80% | 29,051 psi | 46% | 2431 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,722 psi | 54% | 2398 fps | 95.1% |
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 76 powders for 7 mm WSM loaded with the .284 | 170gr | Sierra RN Prohunter. Winchester StaBALL HD delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,946 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:12.5 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. Winchester StaBALL HD, IMR 7828 SSC, Vihtavuori N560 rank at the top here: for 7 mm WSM with the .284 | 170gr | Sierra RN Prohunter 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.