Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Sierra GameKing bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Ramshot Grand 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 56,246 psi | 88% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,566 psi | 90% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,911 psi | 86% | 2969 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 54,462 psi | 85% | 2904 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 55,898 psi | 88% | 2966 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 2867 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,976 psi | 70% | 2828 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,824 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,767 psi | 87% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,609 psi | 90% | 2949 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,956 psi | 88% | 2959 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,217 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,896 psi | 84% | 2966 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,493 psi | 90% | 2927 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 55,129 psi | 86% | 2946 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 2936 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 55,956 psi | 88% | 2959 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 56,043 psi | 88% | 2851 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2956 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,332 psi | 87% | 2900 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,331 psi | 85% | 2858 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 55,869 psi | 88% | 2904 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,868 psi | 86% | 2887 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,100 psi | 86% | 2828 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3071 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,898 psi | 88% | 2940 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 58% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,696 psi | 90% | 2887 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,435 psi | 90% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 57,711 psi | 90% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,898 psi | 89% | 2890 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 53,940 psi | 85% | 2946 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 54,723 psi | 86% | 2818 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,333 psi | 88% | 2867 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,998 psi | 86% | 2887 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 40,611 psi | 64% | 2753 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 56,101 psi | 88% | 2986 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,811 psi | 87% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,621 psi | 86% | 2966 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 54,621 psi | 86% | 2890 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,174 psi | 90% | 2963 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,624 psi | 90% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,956 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3068 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,155 psi | 80% | 2946 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 57,406 psi | 90% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,796 psi | 87% | 2877 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 57,203 psi | 90% | 2936 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 56,043 psi | 88% | 2851 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,723 psi | 86% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,333 psi | 88% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,942 psi | 89% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,348 psi | 90% | 2825 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,753 psi | 89% | 2933 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 57,101 psi | 89% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,377 psi | 90% | 2871 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 56,405 psi | 88% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,157 psi | 85% | 2854 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 54,665 psi | 86% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,624 psi | 90% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,435 psi | 90% | 2894 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 56,637 psi | 89% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,869 psi | 88% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,869 psi | 88% | 2982 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 55,521 psi | 87% | 2956 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2953 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,029 psi | 89% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,608 psi | 87% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,274 psi | 87% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,012 psi | 85% | 2851 fps | 99.3% |
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% | 35,070 psi | 55% | 2484 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 46,920 psi | 74% | 2736 fps | 100% |
| Accurate MAGPRO | 66.4 gr | 86% | 44,295 psi | 69% | 2772 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 39,073 psi | 61% | 2612 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 39,958 psi | 63% | 2657 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 41,205 psi | 65% | 2684 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 32,387 psi | 51% | 2516 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,904 psi | 70% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,011 psi | 82% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,102 psi | 61% | 2605 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,405 psi | 59% | 2605 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,765 psi | 53% | 2513 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,312 psi | 46% | 2418 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,956 psi | 58% | 2651 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,923 psi | 80% | 2812 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 37,275 psi | 58% | 2598 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 40,001 psi | 63% | 2694 fps | 95.9% |
| Bofors RP5 | <<locked>> | 82% | 37,405 psi | 59% | 2605 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,530 psi | 78% | 2743 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,291 psi | 62% | 2644 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 48,428 psi | 76% | 2785 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,097 psi | 80% | 2802 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 42,670 psi | 67% | 2667 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,887 psi | 66% | 2648 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,351 psi | 66% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,838 psi | 55% | 2618 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 48,066 psi | 75% | 2812 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,860 psi | 70% | 2671 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,705 psi | 79% | 2762 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 44,527 psi | 70% | 2680 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,611 psi | 65% | 2612 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 41,191 psi | 65% | 2700 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 48,457 psi | 76% | 2717 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,731 psi | 73% | 2707 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,327 psi | 48% | 2365 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 44,889 psi | 70% | 2710 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 33,257 psi | 52% | 2569 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 36,666 psi | 57% | 2615 fps | 97% |
| Norma URP | <<locked>> | 80% | 45,992 psi | 72% | 2723 fps | 100% |
| Ramshot Grand | 64.7 gr | 86% | 40,959 psi | 64% | 2707 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 44,744 psi | 70% | 2720 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,910 psi | 53% | 2520 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,558 psi | 45% | 1657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,862 psi | 73% | 2759 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,991 psi | 71% | 2772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,953 psi | 53% | 2595 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,092 psi | 69% | 2812 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 53,940 psi | 85% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,437 psi | 63% | 2592 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 38,522 psi | 60% | 2592 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 49,530 psi | 78% | 2743 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,457 psi | 76% | 2717 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,731 psi | 73% | 2707 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,766 psi | 84% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,442 psi | 74% | 2664 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,189 psi | 60% | 2589 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 53,708 psi | 84% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,048 psi | 69% | 2638 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 43,033 psi | 67% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,160 psi | 61% | 2579 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 51,343 psi | 80% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,340 psi | 74% | 2717 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,808 psi | 53% | 2448 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 46,789 psi | 73% | 2723 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,855 psi | 59% | 2589 fps | 99.7% |
| Vihtavuori N560 | 63.7 gr | 84% | 42,322 psi | 66% | 2730 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 42,482 psi | 67% | 2717 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 45,484 psi | 71% | 2825 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,369 psi | 73% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,631 psi | 76% | 2789 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,936 psi | 47% | 2530 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,723 psi | 56% | 2500 fps | 95.1% |
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 | 160gr | Sierra GameKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,071 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 58–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:11.0 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. Vihtavuori N560, Ramshot Grand, Accurate MAGPRO rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | Sierra GameKing 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.