Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 170gr | Geco PLUS 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 Accurate MAGPRO.
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% | 56,217 psi | 88% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,276 psi | 90% | 2818 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,506 psi | 87% | 2894 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 88% | 54,331 psi | 85% | 2825 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 55,825 psi | 87% | 2887 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 2851 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2815 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,462 psi | 85% | 2822 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,607 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,435 psi | 90% | 2867 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,043 psi | 88% | 2884 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,435 psi | 90% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,101 psi | 89% | 2917 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,157 psi | 85% | 2887 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,985 psi | 89% | 2851 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 55,230 psi | 87% | 2871 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 2923 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 56,043 psi | 88% | 2884 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 55,347 psi | 87% | 2762 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,405 psi | 87% | 2881 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 55,013 psi | 86% | 2818 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,421 psi | 90% | 2828 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,405 psi | 87% | 2825 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,418 psi | 85% | 2808 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,795 psi | 86% | 2746 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,028 psi | 88% | 2995 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,448 psi | 87% | 2854 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,101 psi | 89% | 2805 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,681 psi | 89% | 2785 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,334 psi | 90% | 2805 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,260 psi | 88% | 2805 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 57,609 psi | 90% | 2927 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,685 psi | 68% | 2720 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 57,421 psi | 90% | 2782 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,796 psi | 87% | 2782 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,508 psi | 90% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,578 psi | 86% | 2805 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 44,106 psi | 69% | 2753 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 56,072 psi | 88% | 2904 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,434 psi | 87% | 2799 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,607 psi | 86% | 2887 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 54,331 psi | 85% | 2805 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,072 psi | 89% | 2881 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,348 psi | 60% | 1808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,174 psi | 90% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,608 psi | 87% | 2867 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,768 psi | 89% | 2992 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 2949 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 55,245 psi | 87% | 2795 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 57,101 psi | 89% | 2861 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,347 psi | 87% | 2762 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,421 psi | 90% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,796 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,594 psi | 89% | 2740 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,681 psi | 89% | 2854 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,565 psi | 89% | 2789 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 56,260 psi | 88% | 2802 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,450 psi | 90% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,450 psi | 90% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,159 psi | 90% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,058 psi | 89% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,246 psi | 88% | 2795 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,072 psi | 88% | 2828 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,753 psi | 87% | 2904 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 55,767 psi | 87% | 2887 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 2946 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,447 psi | 84% | 2936 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,550 psi | 89% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,013 psi | 86% | 2818 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,217 psi | 88% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,348 psi | 90% | 2828 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% | 37,565 psi | 59% | 2470 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 49,922 psi | 78% | 2710 fps | 100% |
| Accurate MAGPRO | 67.2 gr | 86% | 44,991 psi | 71% | 2710 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 41,524 psi | 65% | 2595 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 82% | 39,769 psi | 62% | 2589 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 90% | 38,508 psi | 60% | 2559 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 86% | 30,560 psi | 48% | 2405 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,916 psi | 66% | 2595 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,834 psi | 75% | 2713 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,524 psi | 65% | 2589 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,521 psi | 59% | 2539 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,318 psi | 57% | 2497 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,343 psi | 49% | 2415 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,030 psi | 63% | 2641 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,253 psi | 74% | 2680 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 34,896 psi | 55% | 2474 fps | 95.5% |
| Bofors RP30 | <<locked>> | 88% | 37,768 psi | 59% | 2572 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 37,521 psi | 59% | 2539 fps | 96.6% |
| Bofors RP7 | <<locked>> | 80% | 51,866 psi | 81% | 2707 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,767 psi | 58% | 2523 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 51,503 psi | 81% | 2762 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,824 psi | 84% | 2772 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,682 psi | 62% | 2536 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,713 psi | 65% | 2579 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,078 psi | 71% | 2595 fps | 100% |
| Hodgdon Retumbo | 60.6 gr | 82% | 32,648 psi | 51% | 2493 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 51,372 psi | 81% | 2789 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1575 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,311 psi | 74% | 2648 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,200 psi | 83% | 2730 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,253 psi | 74% | 2654 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,147 psi | 64% | 2533 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 82% | 38,406 psi | 60% | 2569 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,377 psi | 60% | 2608 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 50,981 psi | 80% | 2684 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,284 psi | 77% | 2677 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,401 psi | 51% | 2352 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 47,732 psi | 75% | 2694 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 31,517 psi | 49% | 2457 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 39,421 psi | 62% | 2605 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 48,776 psi | 76% | 2694 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,000 psi | 60% | 2572 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 47,674 psi | 75% | 2697 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,618 psi | 50% | 2395 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 45% | 1611 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,864 psi | 78% | 2730 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,225 psi | 76% | 2753 fps | 100% |
| ReloadSwiss RS 76 | 64.9 gr | 82% | 31,763 psi | 50% | 2470 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,234 psi | 65% | 2684 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,786 psi | 67% | 2572 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 80% | 41,060 psi | 64% | 2579 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,866 psi | 81% | 2707 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,981 psi | 80% | 2684 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,284 psi | 77% | 2677 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,835 psi | 78% | 2638 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,727 psi | 64% | 2575 fps | 97.6% |
| Somchem S361 | <<locked>> | 80% | 43,555 psi | 68% | 2566 fps | 96.4% |
| Somchem S365 | <<locked>> | 80% | 46,035 psi | 72% | 2651 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,597 psi | 65% | 2559 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 54,041 psi | 85% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,096 psi | 79% | 2687 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,042 psi | 56% | 2438 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 80% | 49,443 psi | 77% | 2690 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,582 psi | 64% | 2572 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,436 psi | 62% | 2595 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 86% | 39,914 psi | 63% | 2595 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 42,685 psi | 67% | 2697 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 49,835 psi | 78% | 2871 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,255 psi | 77% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,503 psi | 81% | 2762 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,837 psi | 51% | 2533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,058 psi | 60% | 2487 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 | 170gr | Geco PLUS. Hodgdon Retumbo delivers the highest muzzle velocity at 2,995 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,995 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 59–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:12.5 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, Accurate MAGPRO rank at the top here: for 7 mm Weath. Mag. with the .284 | 170gr | Geco PLUS 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.