Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 175gr | Swift A-Frame bullet and 71 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 Winchester StaBALL HD.
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% | 55,564 psi | 87% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,710 psi | 89% | 2766 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,114 psi | 85% | 2838 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 57,348 psi | 90% | 2828 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,216 psi | 87% | 2838 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,098 psi | 83% | 2802 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2769 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,609 psi | 90% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,956 psi | 89% | 2818 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,419 psi | 87% | 2831 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,985 psi | 89% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,347 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,522 psi | 90% | 2890 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,550 psi | 89% | 2799 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 54,607 psi | 86% | 2822 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2871 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 55,419 psi | 87% | 2831 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,984 psi | 86% | 2713 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,853 psi | 86% | 2831 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 54,520 psi | 85% | 2766 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,913 psi | 89% | 2776 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,027 psi | 86% | 2776 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,638 psi | 90% | 2815 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,230 psi | 85% | 2694 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,100 psi | 86% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,737 psi | 86% | 2802 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 58% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,724 psi | 89% | 2756 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,347 psi | 88% | 2736 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,898 psi | 89% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,825 psi | 87% | 2756 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 57,058 psi | 89% | 2874 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,091 psi | 68% | 2674 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 57,116 psi | 90% | 2733 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,274 psi | 87% | 2730 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,898 psi | 89% | 2759 fps | 100% |
| Norma 204 | <<locked>> | 84% | 53,940 psi | 85% | 2753 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 43,453 psi | 68% | 2700 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 55,477 psi | 87% | 2854 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,897 psi | 86% | 2746 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,041 psi | 85% | 2838 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 57,406 psi | 90% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,217 psi | 88% | 2828 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,276 psi | 60% | 1768 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,840 psi | 89% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,042 psi | 86% | 2815 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,912 psi | 88% | 2936 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,882 psi | 86% | 2894 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 54,897 psi | 86% | 2746 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 56,594 psi | 89% | 2808 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 54,984 psi | 86% | 2713 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,116 psi | 90% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,274 psi | 87% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,144 psi | 88% | 2690 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,159 psi | 88% | 2805 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,086 psi | 88% | 2736 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 55,796 psi | 87% | 2753 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,058 psi | 89% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,058 psi | 89% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,666 psi | 89% | 2740 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,536 psi | 89% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 55,811 psi | 87% | 2746 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,463 psi | 87% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,187 psi | 86% | 2851 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 55,172 psi | 86% | 2835 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 2894 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2887 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,883 psi | 88% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,737 psi | 86% | 2769 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,332 psi | 87% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,826 psi | 89% | 2776 fps | 99.8% |
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% | 37,188 psi | 58% | 2428 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,458 psi | 78% | 2661 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 40,814 psi | 64% | 2592 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 41,147 psi | 64% | 2549 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 80% | 36,854 psi | 58% | 2484 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 38,116 psi | 60% | 2513 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 86% | 30,168 psi | 47% | 2362 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,326 psi | 74% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,162 psi | 65% | 2543 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,188 psi | 58% | 2493 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,868 psi | 56% | 2451 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,009 psi | 49% | 2372 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,566 psi | 62% | 2595 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,833 psi | 73% | 2631 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 34,534 psi | 54% | 2431 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 34,853 psi | 55% | 2470 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 37,188 psi | 58% | 2493 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 51,634 psi | 81% | 2661 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,332 psi | 57% | 2477 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 50,966 psi | 80% | 2710 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,476 psi | 84% | 2723 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,189 psi | 61% | 2487 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,638 psi | 61% | 2477 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,773 psi | 70% | 2552 fps | 100% |
| Hodgdon Retumbo | 58.8 gr | 82% | 32,401 psi | 51% | 2454 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 50,836 psi | 80% | 2740 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,920 psi | 74% | 2598 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,011 psi | 83% | 2684 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,050 psi | 74% | 2608 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,785 psi | 64% | 2487 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 37,927 psi | 59% | 2520 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,476 psi | 56% | 2507 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 50,546 psi | 79% | 2635 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,863 psi | 77% | 2628 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,082 psi | 50% | 2310 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 47,268 psi | 74% | 2641 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 31,111 psi | 49% | 2411 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 38,957 psi | 61% | 2559 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 48,298 psi | 76% | 2644 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,623 psi | 59% | 2530 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 47,166 psi | 74% | 2648 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,270 psi | 49% | 2352 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 45% | 1578 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,603 psi | 78% | 2684 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,776 psi | 75% | 2703 fps | 100% |
| ReloadSwiss RS 76 | 62.9 gr | 82% | 31,372 psi | 49% | 2425 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,712 psi | 64% | 2638 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,380 psi | 66% | 2526 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 40,640 psi | 64% | 2530 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,634 psi | 81% | 2661 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,546 psi | 79% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,863 psi | 77% | 2628 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,487 psi | 78% | 2589 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,306 psi | 63% | 2526 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 43,236 psi | 68% | 2520 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 45,556 psi | 71% | 2602 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,234 psi | 65% | 2516 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,621 psi | 84% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,676 psi | 78% | 2638 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,708 psi | 56% | 2395 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 49,110 psi | 77% | 2644 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,089 psi | 63% | 2523 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,957 psi | 61% | 2549 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 86% | 39,436 psi | 62% | 2546 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 42,061 psi | 66% | 2648 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 49,139 psi | 77% | 2822 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,892 psi | 77% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,184 psi | 80% | 2713 fps | 99.9% |
| Winchester StaBALL HD | 58.9 gr | 80% | 32,300 psi | 51% | 2487 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,594 psi | 59% | 2441 fps | 96.8% |
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 71 powders for 7 mm Weath. Mag. loaded with the .284 | 175gr | Swift A-Frame. Hodgdon Retumbo delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,940 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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, Winchester StaBALL HD rank at the top here: for 7 mm Weath. Mag. with the .284 | 175gr | Swift A-Frame 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.