Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 180gr | Sierra MatchKing bullet and 73 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 56,115 psi | 88% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,348 psi | 90% | 2736 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 53,983 psi | 85% | 2805 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 90% | 54,781 psi | 86% | 2812 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 54,389 psi | 85% | 2746 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 55,753 psi | 87% | 2808 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,766 psi | 84% | 2779 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,520 psi | 85% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,406 psi | 90% | 2785 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,028 psi | 88% | 2802 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,566 psi | 90% | 2769 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,130 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,954 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,227 psi | 79% | 2792 fps | 96.3% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,869 psi | 89% | 2772 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 55,216 psi | 87% | 2792 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 2844 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 56,028 psi | 88% | 2802 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,390 psi | 87% | 2684 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,259 psi | 87% | 2799 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 55,100 psi | 86% | 2736 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,421 psi | 90% | 2746 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,492 psi | 87% | 2746 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,491 psi | 85% | 2733 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,795 psi | 86% | 2661 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,854 psi | 88% | 2910 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,245 psi | 87% | 2772 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,333 psi | 59% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,290 psi | 90% | 2723 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,782 psi | 89% | 2703 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,522 psi | 90% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,434 psi | 88% | 2730 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 57,696 psi | 90% | 2848 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,729 psi | 69% | 2651 fps | 98% |
| Lovex S065 | <<locked>> | 84% | 57,580 psi | 90% | 2700 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,782 psi | 87% | 2700 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,450 psi | 90% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,563 psi | 86% | 2726 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 44,164 psi | 69% | 2680 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 56,101 psi | 88% | 2825 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,448 psi | 87% | 2717 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,737 psi | 86% | 2812 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 54,331 psi | 85% | 2726 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,130 psi | 90% | 2802 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1742 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,246 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,521 psi | 87% | 2785 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,594 psi | 89% | 2910 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,622 psi | 87% | 2867 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 55,230 psi | 87% | 2717 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 57,029 psi | 89% | 2779 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,390 psi | 87% | 2684 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,580 psi | 90% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,782 psi | 87% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,637 psi | 89% | 2657 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,608 psi | 89% | 2772 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,565 psi | 89% | 2710 fps | 99.1% |
| Somchem S365 | <<locked>> | 86% | 56,478 psi | 89% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,508 psi | 90% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,551 psi | 90% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,232 psi | 90% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,087 psi | 89% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,405 psi | 88% | 2717 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,173 psi | 88% | 2746 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,782 psi | 87% | 2825 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 55,883 psi | 88% | 2808 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 2871 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,417 psi | 84% | 2861 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,565 psi | 89% | 2667 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,100 psi | 86% | 2736 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,159 psi | 88% | 2851 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,392 psi | 90% | 2749 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% | 37,739 psi | 59% | 2405 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 50,154 psi | 79% | 2635 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,901 psi | 64% | 2569 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 41,379 psi | 65% | 2569 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 41,713 psi | 65% | 2526 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 37,231 psi | 58% | 2461 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 36,013 psi | 56% | 2434 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 84% | 28,674 psi | 45% | 2290 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,964 psi | 75% | 2635 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,756 psi | 65% | 2523 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,608 psi | 59% | 2470 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,230 psi | 57% | 2428 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,488 psi | 49% | 2356 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,161 psi | 63% | 2572 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,702 psi | 73% | 2730 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,384 psi | 74% | 2608 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 34,896 psi | 55% | 2408 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 35,375 psi | 55% | 2451 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 37,608 psi | 59% | 2470 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 51,982 psi | 81% | 2631 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,447 psi | 54% | 2398 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 51,459 psi | 81% | 2680 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,911 psi | 84% | 2694 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,595 psi | 62% | 2464 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,015 psi | 61% | 2451 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,150 psi | 71% | 2523 fps | 100% |
| Hodgdon Retumbo | 58.1 gr | 82% | 32,793 psi | 51% | 2434 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 51,547 psi | 81% | 2717 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 44% | 1519 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,514 psi | 74% | 2572 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,345 psi | 84% | 2651 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,456 psi | 74% | 2579 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,321 psi | 65% | 2467 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 80% | 35,897 psi | 56% | 2441 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,897 psi | 56% | 2484 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 50,894 psi | 80% | 2602 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,255 psi | 77% | 2598 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,532 psi | 51% | 2290 fps | 97.9% |
| Norma 204 | <<locked>> | 80% | 47,732 psi | 75% | 2615 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 29,457 psi | 46% | 2339 fps | 95% |
| Norma MRP | <<locked>> | 80% | 39,421 psi | 62% | 2536 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 48,704 psi | 76% | 2615 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,433 psi | 56% | 2444 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 47,645 psi | 75% | 2621 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,662 psi | 50% | 2336 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,819 psi | 45% | 1555 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,125 psi | 79% | 2654 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,153 psi | 75% | 2674 fps | 100% |
| ReloadSwiss RS 76 | 60.6 gr | 80% | 29,559 psi | 46% | 2343 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,162 psi | 65% | 2612 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 42,931 psi | 67% | 2503 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 41,060 psi | 64% | 2507 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 51,982 psi | 81% | 2631 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,894 psi | 80% | 2602 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,255 psi | 77% | 2598 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,893 psi | 78% | 2559 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,712 psi | 64% | 2503 fps | 98% |
| Somchem S361 | <<locked>> | 80% | 43,482 psi | 68% | 2490 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 46,267 psi | 73% | 2575 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,684 psi | 65% | 2490 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 80% | 54,012 psi | 85% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,357 psi | 79% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,245 psi | 57% | 2375 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 49,603 psi | 78% | 2615 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,712 psi | 64% | 2500 fps | 100% |
| Vihtavuori N560 | 58.8 gr | 80% | 39,450 psi | 62% | 2526 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 37,289 psi | 58% | 2470 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 42,656 psi | 67% | 2628 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 98% | 49,705 psi | 78% | 2799 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,226 psi | 77% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,677 psi | 81% | 2684 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,866 psi | 52% | 2464 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,985 psi | 60% | 2418 fps | 97.2% |
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 73 powders for 7 mm Weath. Mag. loaded with the .284 | 180gr | Sierra MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 2,910 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,910 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 180.0 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, Alliant Reloder-33 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 | 180gr | 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.