Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 180gr | Berger BT Target 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% | 56,405 psi | 88% | 2720 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,653 psi | 90% | 2740 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,288 psi | 85% | 2812 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 90% | 55,013 psi | 86% | 2815 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 54,650 psi | 86% | 2749 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 56,014 psi | 88% | 2812 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2782 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,544 psi | 76% | 2749 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,781 psi | 86% | 2749 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,839 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,696 psi | 90% | 2792 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,260 psi | 88% | 2808 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,201 psi | 85% | 2723 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,377 psi | 90% | 2838 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,520 psi | 85% | 2808 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 2799 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,232 psi | 90% | 2779 fps | 97.8% |
| Bofors RP15 | <<locked>> | 94% | 55,448 psi | 87% | 2795 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 2851 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 56,260 psi | 88% | 2808 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,680 psi | 87% | 2687 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,782 psi | 87% | 2808 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 55,332 psi | 87% | 2743 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,667 psi | 90% | 2753 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,767 psi | 87% | 2753 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,723 psi | 86% | 2736 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,085 psi | 86% | 2667 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,347 psi | 88% | 2923 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,767 psi | 87% | 2779 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,276 psi | 90% | 2726 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,043 psi | 89% | 2707 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,244 psi | 85% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,681 psi | 89% | 2733 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 54,172 psi | 85% | 2795 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,164 psi | 69% | 2661 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 54,418 psi | 85% | 2657 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,072 psi | 88% | 2707 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,711 psi | 90% | 2736 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,824 psi | 86% | 2733 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2684 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 56,391 psi | 88% | 2828 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,709 psi | 87% | 2720 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,969 psi | 86% | 2818 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 54,592 psi | 86% | 2730 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,319 psi | 90% | 2805 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,290 psi | 60% | 1742 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,551 psi | 90% | 2762 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,854 psi | 88% | 2789 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,072 psi | 89% | 2917 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 2877 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 55,492 psi | 87% | 2720 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 57,290 psi | 90% | 2782 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,680 psi | 87% | 2687 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,418 psi | 85% | 2657 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,072 psi | 88% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,884 psi | 89% | 2664 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,869 psi | 89% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,014 psi | 89% | 2717 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 56,521 psi | 89% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,244 psi | 85% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,522 psi | 90% | 2713 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,290 psi | 90% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,681 psi | 89% | 2720 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,463 psi | 88% | 2753 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,014 psi | 88% | 2828 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 56,115 psi | 88% | 2815 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 2877 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2871 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,797 psi | 89% | 2671 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,332 psi | 87% | 2743 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,536 psi | 89% | 2858 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,653 psi | 90% | 2753 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% | 37,826 psi | 59% | 2411 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 50,256 psi | 79% | 2635 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,147 psi | 64% | 2575 fps | 97.1% |
| Accurate MAGPRO | <<locked>> | 82% | 41,626 psi | 65% | 2575 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 41,785 psi | 65% | 2530 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 37,260 psi | 58% | 2464 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 36,216 psi | 57% | 2441 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 84% | 28,848 psi | 45% | 2293 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,192 psi | 66% | 2530 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,269 psi | 76% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,800 psi | 66% | 2523 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,681 psi | 59% | 2474 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,521 psi | 57% | 2431 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,546 psi | 49% | 2359 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,437 psi | 63% | 2579 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 47,079 psi | 74% | 2736 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,558 psi | 75% | 2612 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 35,143 psi | 55% | 2415 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 35,621 psi | 56% | 2457 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 37,681 psi | 59% | 2474 fps | 97.2% |
| Bofors RP7 | <<locked>> | 80% | 52,272 psi | 82% | 2638 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,461 psi | 54% | 2398 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 51,706 psi | 81% | 2687 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,954 psi | 85% | 2697 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 39,827 psi | 62% | 2470 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,073 psi | 61% | 2454 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,440 psi | 71% | 2526 fps | 100% |
| Hodgdon Retumbo | 58.4 gr | 82% | 33,011 psi | 52% | 2444 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 51,793 psi | 81% | 2720 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 44% | 1519 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,558 psi | 75% | 2575 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,650 psi | 84% | 2657 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,747 psi | 75% | 2585 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,350 psi | 65% | 2470 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 36,114 psi | 57% | 2448 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,129 psi | 57% | 2490 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 51,169 psi | 80% | 2608 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,516 psi | 78% | 2605 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,779 psi | 51% | 2297 fps | 98% |
| Norma 204 | <<locked>> | 80% | 47,993 psi | 75% | 2621 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 29,660 psi | 46% | 2343 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 39,697 psi | 62% | 2543 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 49,037 psi | 77% | 2621 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,679 psi | 56% | 2451 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 47,935 psi | 75% | 2625 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,879 psi | 50% | 2343 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,848 psi | 45% | 1558 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,198 psi | 79% | 2657 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,443 psi | 76% | 2680 fps | 100% |
| ReloadSwiss RS 76 | 60.9 gr | 80% | 29,747 psi | 47% | 2349 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 38,479 psi | 60% | 2556 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 42,975 psi | 67% | 2507 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 41,307 psi | 65% | 2513 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 52,272 psi | 82% | 2638 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,169 psi | 80% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,516 psi | 78% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,111 psi | 79% | 2566 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,973 psi | 64% | 2507 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 43,700 psi | 68% | 2497 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 46,325 psi | 73% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,727 psi | 65% | 2493 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 50,401 psi | 79% | 2615 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,303 psi | 57% | 2375 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 49,850 psi | 78% | 2621 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,828 psi | 64% | 2503 fps | 100% |
| Vihtavuori N560 | 59.1 gr | 80% | 39,711 psi | 62% | 2533 fps | 96% |
| Vihtavuori N565 | <<locked>> | 84% | 37,521 psi | 59% | 2474 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 92% | 42,859 psi | 67% | 2635 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 98% | 50,169 psi | 79% | 2805 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,472 psi | 78% | 2572 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,953 psi | 81% | 2690 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,156 psi | 52% | 2470 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,232 psi | 60% | 2425 fps | 97.3% |
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 | Berger BT Target. Hodgdon Retumbo delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,923 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 | Berger BT Target 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.