Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Nosler Partition bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-25, Vihtavuori N560 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% | 56,173 psi | 88% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,566 psi | 90% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,839 psi | 86% | 2966 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 54,650 psi | 86% | 2904 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 56,072 psi | 88% | 2969 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2864 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,918 psi | 70% | 2825 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,795 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,709 psi | 87% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,114 psi | 85% | 2890 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,159 psi | 88% | 2963 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,479 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,824 psi | 84% | 2963 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,682 psi | 90% | 2927 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 55,071 psi | 86% | 2943 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,692 psi | 83% | 2936 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 56,159 psi | 88% | 2963 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 55,985 psi | 88% | 2848 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 2953 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,550 psi | 87% | 2904 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,520 psi | 85% | 2861 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 55,825 psi | 87% | 2904 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,839 psi | 86% | 2887 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,071 psi | 86% | 2828 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3068 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,840 psi | 88% | 2936 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 58% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,653 psi | 90% | 2887 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,377 psi | 90% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,186 psi | 85% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,840 psi | 89% | 2887 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 53,853 psi | 84% | 2943 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 54,636 psi | 86% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,275 psi | 88% | 2864 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,230 psi | 87% | 2890 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 40,596 psi | 64% | 2749 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 56,057 psi | 88% | 2986 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,753 psi | 87% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,578 psi | 86% | 2963 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 54,810 psi | 86% | 2890 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,087 psi | 89% | 2959 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 60% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,595 psi | 90% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,927 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3068 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 2949 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 57,609 psi | 90% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,738 psi | 87% | 2874 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 57,392 psi | 90% | 2940 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,985 psi | 88% | 2848 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,636 psi | 86% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,275 psi | 88% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,188 psi | 90% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,566 psi | 90% | 2825 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,942 psi | 89% | 2936 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 57,043 psi | 89% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,334 psi | 90% | 2871 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 56,376 psi | 88% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,114 psi | 85% | 2854 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 54,853 psi | 86% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,595 psi | 90% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,392 psi | 90% | 2890 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 56,869 psi | 89% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,057 psi | 88% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,796 psi | 87% | 2979 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 55,709 psi | 87% | 2959 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2956 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,203 psi | 90% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,550 psi | 87% | 2904 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,419 psi | 87% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,954 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% | 35,215 psi | 55% | 2487 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 47,123 psi | 74% | 2740 fps | 100% |
| Accurate MAGPRO | 66.5 gr | 86% | 44,454 psi | 70% | 2776 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 39,044 psi | 61% | 2608 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 39,914 psi | 63% | 2654 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 41,176 psi | 65% | 2680 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 32,518 psi | 51% | 2520 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,846 psi | 70% | 2740 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,996 psi | 81% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,247 psi | 62% | 2608 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,550 psi | 59% | 2605 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,750 psi | 53% | 2513 fps | 99.7% |
| Alliant Reloder-25 | 57.8 gr | 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% | 50,894 psi | 80% | 2808 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 37,260 psi | 58% | 2598 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 40,161 psi | 63% | 2697 fps | 95.9% |
| Bofors RP5 | <<locked>> | 82% | 37,550 psi | 59% | 2605 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,501 psi | 78% | 2740 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,436 psi | 62% | 2644 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 48,602 psi | 76% | 2789 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,082 psi | 80% | 2802 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 42,612 psi | 67% | 2664 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,829 psi | 66% | 2648 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,511 psi | 67% | 2628 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,925 psi | 55% | 2621 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 48,283 psi | 76% | 2812 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 44% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,831 psi | 70% | 2671 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,879 psi | 80% | 2766 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 44,686 psi | 70% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,582 psi | 65% | 2608 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 41,162 psi | 65% | 2697 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 48,385 psi | 76% | 2713 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,688 psi | 73% | 2703 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 30,313 psi | 48% | 2362 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 45,049 psi | 71% | 2713 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 33,214 psi | 52% | 2569 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 36,651 psi | 57% | 2612 fps | 97% |
| Norma URP | <<locked>> | 80% | 45,948 psi | 72% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 40,930 psi | 64% | 2707 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 44,918 psi | 70% | 2720 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,910 psi | 53% | 2516 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 45% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,833 psi | 73% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,947 psi | 70% | 2772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,055 psi | 53% | 2595 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,019 psi | 69% | 2808 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 53,911 psi | 84% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,408 psi | 63% | 2589 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 38,508 psi | 60% | 2592 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 49,501 psi | 78% | 2740 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,385 psi | 76% | 2713 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,688 psi | 73% | 2703 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,722 psi | 84% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,384 psi | 74% | 2664 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,174 psi | 60% | 2585 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 53,664 psi | 84% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,990 psi | 69% | 2638 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 43,018 psi | 67% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,102 psi | 61% | 2575 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 51,314 psi | 80% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,514 psi | 74% | 2720 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,924 psi | 53% | 2451 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 46,731 psi | 73% | 2720 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,811 psi | 59% | 2585 fps | 99.6% |
| Vihtavuori N560 | 63.7 gr | 84% | 42,293 psi | 66% | 2726 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 42,453 psi | 67% | 2717 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 45,426 psi | 71% | 2822 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,528 psi | 73% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,602 psi | 76% | 2789 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,052 psi | 47% | 2530 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,679 psi | 56% | 2500 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 | 160gr | Nosler Partition. Hodgdon Retumbo delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,068 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 160.0 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-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. Alliant Reloder-25, Vihtavuori N560, Accurate MAGPRO rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | Nosler Partition they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.