Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 175gr | Sierra MatchKing 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 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% | 55,158 psi | 86% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,188 psi | 88% | 2759 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,565 psi | 89% | 2884 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 57,624 psi | 90% | 2890 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 56,942 psi | 89% | 2822 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 54,810 psi | 86% | 2831 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 2792 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,123 psi | 74% | 2759 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,087 psi | 89% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,304 psi | 88% | 2808 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,027 psi | 86% | 2825 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,289 psi | 88% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,666 psi | 87% | 2854 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,811 psi | 89% | 2881 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,101 psi | 88% | 2792 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 57,580 psi | 90% | 2864 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,405 psi | 87% | 2861 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 55,027 psi | 86% | 2825 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,520 psi | 85% | 2707 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 54,244 psi | 85% | 2822 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 57,580 psi | 90% | 2808 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,449 psi | 88% | 2769 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 54,375 psi | 85% | 2766 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,232 psi | 90% | 2808 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,363 psi | 90% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,708 psi | 86% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,288 psi | 85% | 2795 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,304 psi | 88% | 2749 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,912 psi | 88% | 2726 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,434 psi | 88% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,434 psi | 87% | 2749 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 56,637 psi | 89% | 2867 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,743 psi | 67% | 2667 fps | 97.5% |
| Lovex S065 | <<locked>> | 84% | 56,695 psi | 89% | 2723 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,100 psi | 86% | 2726 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,231 psi | 88% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,334 psi | 90% | 2805 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 42,888 psi | 67% | 2690 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,781 psi | 86% | 2844 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,636 psi | 86% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,479 psi | 90% | 2890 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 57,000 psi | 89% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,550 psi | 87% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1765 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,101 psi | 88% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,607 psi | 86% | 2808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,332 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 2884 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 88% | 54,244 psi | 85% | 2733 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 56,130 psi | 88% | 2802 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 54,520 psi | 85% | 2707 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,695 psi | 89% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,100 psi | 86% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,724 psi | 87% | 2680 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,695 psi | 87% | 2799 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,753 psi | 87% | 2733 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 55,303 psi | 87% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,405 psi | 88% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,840 psi | 89% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,202 psi | 88% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,144 psi | 88% | 2756 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 55,390 psi | 87% | 2740 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,984 psi | 86% | 2769 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,534 psi | 85% | 2841 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 54,549 psi | 85% | 2825 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 2887 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2877 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,492 psi | 87% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,317 psi | 85% | 2762 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,505 psi | 85% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,188 psi | 88% | 2769 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% | 36,941 psi | 58% | 2425 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 49,211 psi | 77% | 2654 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,943 psi | 63% | 2582 fps | 96.4% |
| Accurate MAGPRO | <<locked>> | 82% | 40,408 psi | 63% | 2582 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 40,915 psi | 64% | 2543 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 38,986 psi | 61% | 2533 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 90% | 37,652 psi | 59% | 2503 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 29,892 psi | 47% | 2352 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,021 psi | 74% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,944 psi | 64% | 2536 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,767 psi | 58% | 2487 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,447 psi | 56% | 2444 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,821 psi | 48% | 2369 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,117 psi | 61% | 2589 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,559 psi | 78% | 2680 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 34,316 psi | 54% | 2425 fps | 95.5% |
| Bofors RP30 | <<locked>> | 88% | 36,883 psi | 58% | 2516 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 36,767 psi | 58% | 2487 fps | 96.6% |
| Bofors RP7 | <<locked>> | 80% | 51,213 psi | 80% | 2654 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,027 psi | 56% | 2467 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 50,488 psi | 79% | 2703 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,040 psi | 83% | 2717 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,001 psi | 61% | 2484 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,886 psi | 64% | 2523 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,295 psi | 69% | 2543 fps | 100% |
| Hodgdon Retumbo | 58.3 gr | 82% | 32,097 psi | 50% | 2444 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,415 psi | 79% | 2733 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 44% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,702 psi | 73% | 2595 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,576 psi | 82% | 2674 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,572 psi | 73% | 2598 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,596 psi | 64% | 2484 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 82% | 37,565 psi | 59% | 2513 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,391 psi | 59% | 2552 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 50,082 psi | 78% | 2628 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,646 psi | 76% | 2625 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,850 psi | 50% | 2306 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 46,833 psi | 73% | 2635 fps | 98.7% |
| Norma 217 | <<locked>> | 90% | 30,806 psi | 48% | 2405 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,522 psi | 60% | 2549 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 48,066 psi | 75% | 2641 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,246 psi | 58% | 2520 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,746 psi | 73% | 2641 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,937 psi | 48% | 2346 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 45% | 1575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,139 psi | 77% | 2677 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,326 psi | 74% | 2697 fps | 100% |
| ReloadSwiss RS 76 | 62.4 gr | 82% | 31,096 psi | 49% | 2418 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,190 psi | 63% | 2625 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 42,177 psi | 66% | 2523 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 80% | 40,219 psi | 63% | 2523 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,213 psi | 80% | 2654 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,082 psi | 78% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,646 psi | 76% | 2625 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,066 psi | 77% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,914 psi | 63% | 2520 fps | 97.5% |
| Somchem S361 | <<locked>> | 80% | 42,888 psi | 67% | 2513 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 45,281 psi | 71% | 2598 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,857 psi | 64% | 2507 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,388 psi | 84% | 2621 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,443 psi | 77% | 2635 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,520 psi | 56% | 2388 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 80% | 48,689 psi | 76% | 2638 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,842 psi | 62% | 2520 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,595 psi | 60% | 2539 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 39,059 psi | 61% | 2539 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 92% | 41,553 psi | 65% | 2638 fps | 95% |
| Vihtavuori N570 | <<locked>> | 98% | 48,573 psi | 76% | 2808 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,501 psi | 76% | 2592 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,705 psi | 79% | 2703 fps | 99.9% |
| Winchester StaBALL HD | 58.4 gr | 80% | 31,807 psi | 50% | 2477 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,420 psi | 59% | 2438 fps | 96.7% |
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 MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 2,933 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,933 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 1:10.0 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 | Sierra MatchKing 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.