Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 177gr | RWS ID Classic 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 Accurate High Country.
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>> | 90% | 54,143 psi | 85% | 2717 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,955 psi | 86% | 2733 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 55,622 psi | 87% | 2861 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 90% | 56,666 psi | 89% | 2871 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 55,840 psi | 88% | 2799 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 57,551 psi | 90% | 2864 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2835 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,144 psi | 88% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,288 psi | 87% | 2785 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,041 psi | 85% | 2802 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,651 psi | 87% | 2772 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,187 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,144 psi | 88% | 2861 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2858 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,766 psi | 86% | 2772 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 56,927 psi | 89% | 2848 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 55,042 psi | 86% | 2848 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 54,041 psi | 85% | 2802 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,565 psi | 89% | 2733 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,246 psi | 90% | 2861 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,463 psi | 88% | 2789 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,232 psi | 90% | 2805 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,941 psi | 88% | 2785 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,260 psi | 88% | 2713 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,172 psi | 85% | 2917 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,116 psi | 90% | 2828 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,129 psi | 86% | 2726 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,390 psi | 87% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,624 psi | 90% | 2779 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 55,782 psi | 87% | 2848 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,426 psi | 71% | 2710 fps | 98.4% |
| Lovex S065 | <<locked>> | 82% | 55,332 psi | 87% | 2700 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,116 psi | 90% | 2749 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,637 psi | 87% | 2736 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,999 psi | 88% | 2779 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 46,006 psi | 72% | 2736 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 53,882 psi | 84% | 2822 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,913 psi | 89% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,594 psi | 89% | 2867 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 55,825 psi | 87% | 2779 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,042 psi | 86% | 2805 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 60% | 1772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,056 psi | 86% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,334 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,752 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,925 psi | 85% | 2871 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 56,623 psi | 89% | 2769 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 54,926 psi | 86% | 2779 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 56,565 psi | 89% | 2733 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,332 psi | 87% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,116 psi | 90% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,418 psi | 85% | 2657 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,520 psi | 85% | 2772 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 54,476 psi | 85% | 2710 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 54,418 psi | 85% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,347 psi | 87% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,882 psi | 86% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,172 psi | 86% | 2736 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,551 psi | 90% | 2805 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 84% | 57,682 psi | 90% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,317 psi | 85% | 2749 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,508 psi | 90% | 2881 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 96% | 57,653 psi | 90% | 2867 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 54,810 psi | 86% | 2871 fps | 98.6% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,593 psi | 87% | 2927 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,215 psi | 85% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,710 psi | 89% | 2792 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,433 psi | 85% | 2858 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,143 psi | 86% | 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% | 38,885 psi | 61% | 2454 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 51,576 psi | 81% | 2684 fps | 100% |
| Accurate High Country | 61.2 gr | 80% | 42,206 psi | 66% | 2621 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 80% | 39,929 psi | 63% | 2562 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 42,888 psi | 67% | 2575 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 38,247 psi | 60% | 2510 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 88% | 37,072 psi | 58% | 2487 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 29,515 psi | 46% | 2336 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,153 psi | 77% | 2684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,859 psi | 67% | 2572 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,711 psi | 61% | 2520 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,521 psi | 59% | 2474 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,460 psi | 51% | 2405 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,742 psi | 65% | 2625 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,704 psi | 76% | 2792 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,556 psi | 71% | 2605 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 36,027 psi | 56% | 2457 fps | 96.5% |
| Bofors RP30 | <<locked>> | 84% | 34,229 psi | 54% | 2444 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 38,711 psi | 61% | 2520 fps | 97.5% |
| Bofors RP7 | <<locked>> | 80% | 53,229 psi | 83% | 2680 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 35,375 psi | 55% | 2448 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 52,866 psi | 83% | 2733 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,799 psi | 64% | 2516 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,074 psi | 63% | 2500 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,514 psi | 73% | 2572 fps | 100% |
| Hodgdon Retumbo | 59 gr | 80% | 31,662 psi | 50% | 2425 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 52,910 psi | 83% | 2766 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,181 psi | 44% | 1545 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,646 psi | 76% | 2625 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 48,747 psi | 76% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,322 psi | 66% | 2516 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 36,912 psi | 58% | 2490 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,853 psi | 55% | 2484 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 52,112 psi | 82% | 2654 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,444 psi | 79% | 2648 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,533 psi | 53% | 2336 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 49,023 psi | 77% | 2667 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 30,705 psi | 48% | 2395 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 40,770 psi | 64% | 2585 fps | 99% |
| Norma URP | <<locked>> | 80% | 50,038 psi | 78% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,608 psi | 57% | 2500 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 48,994 psi | 77% | 2674 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,692 psi | 51% | 2382 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,906 psi | 45% | 1585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,547 psi | 81% | 2707 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,777 psi | 78% | 2726 fps | 100% |
| ReloadSwiss RS 76 | 63.1 gr | 80% | 30,589 psi | 48% | 2398 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,813 psi | 62% | 2608 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 43,845 psi | 69% | 2549 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 42,250 psi | 66% | 2559 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 53,229 psi | 83% | 2680 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,112 psi | 82% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,444 psi | 79% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,966 psi | 80% | 2608 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,916 psi | 66% | 2552 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 44,672 psi | 70% | 2543 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 47,659 psi | 75% | 2625 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,757 psi | 67% | 2539 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 51,619 psi | 81% | 2661 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,289 psi | 58% | 2421 fps | 97.6% |
| Vihtavuori N170 | <<locked>> | 96% | 53,882 psi | 84% | 2746 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 50,720 psi | 79% | 2661 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,872 psi | 66% | 2549 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,712 psi | 64% | 2579 fps | 96.3% |
| Vihtavuori N565 | <<locked>> | 84% | 38,580 psi | 60% | 2520 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 41,162 psi | 65% | 2621 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 48,341 psi | 76% | 2799 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,604 psi | 79% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,098 psi | 83% | 2736 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,432 psi | 54% | 2516 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,189 psi | 61% | 2467 fps | 97.5% |
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 | 177gr | RWS ID Classic. Vihtavuori N570 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,927 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 59–90 %, leaving at least 10 % headroom. The 177.0 gr projectile in 0.284" calls for a 1:11.5 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, Accurate High Country rank at the top here: for 7 mm Weath. Mag. with the .284 | 177gr | RWS ID Classic 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.