Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 175gr | Sierra GameKing bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 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>> | 92% | 55,840 psi | 88% | 2749 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,985 psi | 89% | 2772 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,522 psi | 90% | 2900 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 90% | 54,592 psi | 86% | 2848 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 57,580 psi | 90% | 2831 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,419 psi | 87% | 2844 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,505 psi | 84% | 2812 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2776 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,273 psi | 85% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,174 psi | 90% | 2825 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,651 psi | 87% | 2838 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,217 psi | 90% | 2805 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,608 psi | 89% | 2871 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,795 psi | 84% | 2838 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,666 psi | 89% | 2805 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 54,853 psi | 86% | 2825 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 2881 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 55,651 psi | 87% | 2838 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,230 psi | 87% | 2720 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,998 psi | 86% | 2835 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 54,766 psi | 86% | 2772 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,159 psi | 90% | 2782 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,245 psi | 87% | 2782 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,230 psi | 85% | 2766 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,505 psi | 85% | 2700 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,564 psi | 87% | 2949 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,969 psi | 86% | 2808 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,942 psi | 89% | 2759 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,594 psi | 89% | 2740 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,145 psi | 90% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,999 psi | 88% | 2762 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 57,566 psi | 90% | 2884 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,526 psi | 68% | 2684 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 57,363 psi | 90% | 2740 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,521 psi | 87% | 2736 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,101 psi | 89% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,433 psi | 85% | 2766 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 43,918 psi | 69% | 2713 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 55,709 psi | 87% | 2858 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,172 psi | 86% | 2753 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,273 psi | 85% | 2844 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 57,653 psi | 90% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,710 psi | 89% | 2838 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 60% | 1772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,072 psi | 89% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,288 psi | 87% | 2822 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,376 psi | 88% | 2946 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 2904 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 55,114 psi | 86% | 2753 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 56,826 psi | 89% | 2815 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,230 psi | 87% | 2720 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,363 psi | 90% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,521 psi | 87% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,362 psi | 88% | 2694 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,405 psi | 88% | 2812 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,478 psi | 89% | 2746 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 56,072 psi | 88% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,261 psi | 90% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,319 psi | 90% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,927 psi | 89% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,971 psi | 89% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,101 psi | 88% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,753 psi | 87% | 2782 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,419 psi | 87% | 2858 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 55,622 psi | 87% | 2844 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 2907 fps | 98.6% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2897 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,333 psi | 88% | 2703 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,027 psi | 86% | 2776 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,883 psi | 88% | 2890 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,029 psi | 89% | 2782 fps | 99.9% |
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% | 37,391 psi | 59% | 2434 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,763 psi | 78% | 2667 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,611 psi | 64% | 2595 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 82% | 41,234 psi | 65% | 2602 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,365 psi | 65% | 2556 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 37,072 psi | 58% | 2493 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 90% | 38,305 psi | 60% | 2523 fps | 96% |
| ADI AR 2225 | <<locked>> | 86% | 30,429 psi | 48% | 2372 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,587 psi | 75% | 2671 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,394 psi | 65% | 2549 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,420 psi | 59% | 2503 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,085 psi | 57% | 2457 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,212 psi | 49% | 2382 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,827 psi | 62% | 2602 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,166 psi | 74% | 2638 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 34,780 psi | 55% | 2438 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 35,099 psi | 55% | 2477 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 37,420 psi | 59% | 2503 fps | 96.9% |
| Bofors RP7 | <<locked>> | 80% | 51,895 psi | 81% | 2667 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 86% | 36,492 psi | 57% | 2480 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 51,227 psi | 80% | 2717 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,737 psi | 84% | 2733 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,407 psi | 62% | 2497 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,870 psi | 61% | 2484 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,034 psi | 71% | 2559 fps | 100% |
| Hodgdon Retumbo | 59.1 gr | 82% | 32,590 psi | 51% | 2461 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 51,314 psi | 80% | 2749 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,007 psi | 44% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,166 psi | 74% | 2605 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,011 psi | 83% | 2687 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,311 psi | 74% | 2615 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,002 psi | 64% | 2493 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 38,145 psi | 60% | 2530 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,679 psi | 56% | 2513 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 50,763 psi | 80% | 2641 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,110 psi | 77% | 2635 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,314 psi | 51% | 2316 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 47,500 psi | 74% | 2651 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 31,285 psi | 49% | 2421 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 39,204 psi | 61% | 2566 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 48,573 psi | 76% | 2654 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,840 psi | 59% | 2536 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 47,413 psi | 74% | 2654 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,444 psi | 49% | 2359 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1581 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,864 psi | 78% | 2690 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,037 psi | 75% | 2710 fps | 100% |
| ReloadSwiss RS 76 | 61.7 gr | 80% | 29,472 psi | 46% | 2369 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,915 psi | 64% | 2644 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 42,627 psi | 67% | 2533 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 40,901 psi | 64% | 2539 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 51,895 psi | 81% | 2667 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,763 psi | 80% | 2641 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,110 psi | 77% | 2635 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,734 psi | 78% | 2595 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,567 psi | 64% | 2533 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 43,410 psi | 68% | 2526 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 45,847 psi | 72% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,481 psi | 65% | 2523 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,867 psi | 84% | 2631 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,951 psi | 78% | 2644 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,926 psi | 56% | 2402 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 80% | 49,356 psi | 77% | 2651 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,379 psi | 63% | 2530 fps | 100% |
| Vihtavuori N560 | 59.8 gr | 80% | 39,204 psi | 61% | 2556 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 39,668 psi | 62% | 2556 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 92% | 42,453 psi | 67% | 2661 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 98% | 49,559 psi | 78% | 2831 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,124 psi | 77% | 2605 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,430 psi | 81% | 2720 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,590 psi | 51% | 2493 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,797 psi | 59% | 2451 fps | 96.9% |
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 72 powders for 7 mm Weath. Mag. loaded with the .284 | 175gr | Sierra GameKing. Hodgdon Retumbo delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,949 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 175.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 175gr | Sierra GameKing 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.