Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 170gr | Hammer HHT bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 94% | 54,331 psi | 85% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,811 psi | 87% | 2782 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,840 psi | 88% | 2900 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 56,623 psi | 89% | 2904 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 56,884 psi | 89% | 2740 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,449 psi | 88% | 2841 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 54,186 psi | 85% | 2844 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,472 psi | 76% | 2743 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,163 psi | 68% | 2707 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,826 psi | 89% | 2838 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,637 psi | 89% | 2835 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,969 psi | 85% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,115 psi | 88% | 2831 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,201 psi | 85% | 2841 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,448 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,534 psi | 85% | 2871 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,622 psi | 87% | 2900 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,101 psi | 88% | 2805 fps | 96.5% |
| Bofors RP15 | <<locked>> | 98% | 56,826 psi | 89% | 2881 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,633 psi | 79% | 2818 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 54,201 psi | 85% | 2841 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 54,679 psi | 86% | 2733 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,447 psi | 84% | 2831 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 86% | 57,450 psi | 90% | 2838 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,579 psi | 89% | 2795 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 54,070 psi | 85% | 2782 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,797 psi | 89% | 2825 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,840 psi | 89% | 2759 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,388 psi | 84% | 2940 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 53,940 psi | 85% | 2818 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,115 psi | 88% | 2769 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,173 psi | 88% | 2756 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,202 psi | 88% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,259 psi | 87% | 2769 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 55,593 psi | 87% | 2877 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 56,884 psi | 89% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,984 psi | 86% | 2749 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,217 psi | 90% | 2825 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2635 fps | 98% |
| Norma MRP | <<locked>> | 92% | 54,027 psi | 85% | 2861 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,331 psi | 85% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,449 psi | 88% | 2900 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 56,695 psi | 89% | 2825 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,708 psi | 86% | 2838 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 60% | 1768 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,464 psi | 90% | 2835 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,782 psi | 87% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,998 psi | 85% | 2835 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2940 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,921 psi | 77% | 2825 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 55,999 psi | 88% | 2730 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,346 psi | 85% | 2759 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 55,550 psi | 87% | 2818 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 54,679 psi | 86% | 2733 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,884 psi | 89% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,984 psi | 86% | 2749 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,421 psi | 90% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,854 psi | 88% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,883 psi | 88% | 2707 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,114 psi | 86% | 2815 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 55,666 psi | 87% | 2723 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,695 psi | 87% | 2749 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 54,462 psi | 85% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,941 psi | 88% | 2789 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,029 psi | 89% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,014 psi | 88% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,637 psi | 87% | 2776 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,288 psi | 87% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,288 psi | 85% | 2792 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,711 psi | 90% | 2917 fps | 99% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2894 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,270 psi | 79% | 2831 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,390 psi | 87% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,682 psi | 90% | 2838 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,898 psi | 89% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,043 psi | 88% | 2789 fps | 99.6% |
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% | 34,055 psi | 53% | 2385 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 45,672 psi | 72% | 2628 fps | 100% |
| Accurate High Country | 57.7 gr | 82% | 39,349 psi | 62% | 2595 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 86% | 42,830 psi | 67% | 2657 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 53,534 psi | 84% | 2694 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,058 psi | 60% | 2507 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 86% | 41,350 psi | 65% | 2605 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 39,755 psi | 62% | 2569 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 31,328 psi | 49% | 2415 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,450 psi | 60% | 2507 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,729 psi | 69% | 2631 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,343 psi | 79% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,101 psi | 60% | 2500 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,201 psi | 57% | 2500 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,634 psi | 51% | 2411 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,485 psi | 45% | 2323 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,520 psi | 56% | 2543 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,794 psi | 83% | 2753 fps | 95.8% |
| Bofors RP15 | <<locked>> | 84% | 36,114 psi | 57% | 2497 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 38,653 psi | 61% | 2585 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,201 psi | 57% | 2500 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,385 psi | 76% | 2628 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,116 psi | 60% | 2536 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 47,239 psi | 74% | 2674 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 49,864 psi | 78% | 2687 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,481 psi | 65% | 2559 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,352 psi | 68% | 2595 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,220 psi | 65% | 2520 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,692 psi | 53% | 2510 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 46,543 psi | 73% | 2697 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,830 psi | 69% | 2566 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,603 psi | 78% | 2651 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,366 psi | 68% | 2572 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,451 psi | 63% | 2500 fps | 95.1% |
| IMR 7828 SSC | 58.3 gr | 86% | 39,885 psi | 63% | 2589 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,268 psi | 74% | 2605 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,614 psi | 71% | 2595 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,283 psi | 46% | 2264 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,671 psi | 68% | 2598 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 31,966 psi | 50% | 2464 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 35,360 psi | 55% | 2507 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 44,744 psi | 70% | 2615 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,421 psi | 62% | 2589 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,439 psi | 68% | 2608 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 32,750 psi | 51% | 2415 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 1578 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,476 psi | 84% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,556 psi | 71% | 2648 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,671 psi | 68% | 2664 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,764 psi | 51% | 2487 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,221 psi | 66% | 2697 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,605 psi | 82% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,392 psi | 62% | 2487 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 37,449 psi | 59% | 2490 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,385 psi | 76% | 2628 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,268 psi | 74% | 2605 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,614 psi | 71% | 2595 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,809 psi | 84% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,489 psi | 82% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,238 psi | 72% | 2556 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,115 psi | 58% | 2484 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 52,359 psi | 82% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,714 psi | 67% | 2530 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 41,771 psi | 65% | 2572 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,000 psi | 60% | 2474 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,154 psi | 79% | 2605 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,195 psi | 72% | 2608 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,895 psi | 52% | 2349 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 45,426 psi | 71% | 2608 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,593 psi | 57% | 2484 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 40,828 psi | 64% | 2615 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 90% | 40,944 psi | 64% | 2605 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 43,526 psi | 68% | 2707 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,179 psi | 71% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,239 psi | 74% | 2674 fps | 99.5% |
| Winchester StaBALL HD | 55.7 gr | 80% | 28,935 psi | 45% | 2428 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,577 psi | 54% | 2395 fps | 95% |
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 78 powders for 7 mm Weath. Mag. loaded with the .284 | 170gr | Hammer HHT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,949 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 170.0 gr projectile in 0.284" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Weath. Mag. with the .284 | 170gr | Hammer HHT 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.