Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | NorthFork Bonded Core bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,882 psi | 86% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,231 psi | 88% | 2881 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,217 psi | 90% | 2999 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,276 psi | 90% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,927 psi | 89% | 2936 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 54,621 psi | 86% | 2940 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,008 psi | 77% | 2835 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,787 psi | 69% | 2799 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,130 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,433 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,521 psi | 89% | 2927 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,636 psi | 86% | 2936 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,767 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,405 psi | 88% | 2999 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,420 psi | 88% | 2897 fps | 96.3% |
| Bofors RP15 | <<locked>> | 98% | 57,406 psi | 90% | 2979 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2910 fps | 98.5% |
| Bofors RP5 | <<locked>> | 94% | 54,636 psi | 86% | 2936 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 55,085 psi | 86% | 2828 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,186 psi | 85% | 2930 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 54,143 psi | 85% | 2877 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,811 psi | 89% | 2890 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 54,592 psi | 86% | 2877 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,203 psi | 90% | 2920 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,508 psi | 90% | 2858 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3041 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 54,549 psi | 85% | 2913 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1798 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,594 psi | 89% | 2867 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,550 psi | 89% | 2851 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,492 psi | 89% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,695 psi | 87% | 2864 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 56,246 psi | 88% | 2976 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 57,174 psi | 90% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,216 psi | 87% | 2844 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,956 psi | 88% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,740 psi | 90% | 2923 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,334 psi | 62% | 2720 fps | 97.7% |
| Norma MRP | <<locked>> | 92% | 54,462 psi | 85% | 2956 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 54,549 psi | 85% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,145 psi | 90% | 2999 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 57,188 psi | 90% | 2923 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,288 psi | 87% | 2930 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,840 psi | 59% | 1841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,173 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,505 psi | 85% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2917 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 82% | 56,304 psi | 88% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,752 psi | 86% | 2854 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 56,057 psi | 88% | 2917 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 55,085 psi | 86% | 2828 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,174 psi | 90% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,216 psi | 87% | 2844 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,188 psi | 88% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,260 psi | 88% | 2802 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,622 psi | 87% | 2910 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,043 psi | 88% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,028 psi | 88% | 2844 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 55,071 psi | 86% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,521 psi | 89% | 2887 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 57,145 psi | 90% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,434 psi | 88% | 2854 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,941 psi | 88% | 2864 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 55,506 psi | 87% | 2858 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,636 psi | 86% | 2884 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,302 psi | 85% | 2953 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 54,041 psi | 85% | 2927 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2923 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,999 psi | 88% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,375 psi | 85% | 2881 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,609 psi | 90% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,376 psi | 88% | 2884 fps | 99.4% |
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% | 34,214 psi | 54% | 2461 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 45,847 psi | 72% | 2713 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 46,398 psi | 73% | 2808 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 53,838 psi | 84% | 2789 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,218 psi | 60% | 2585 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 41,800 psi | 66% | 2694 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 40,190 psi | 63% | 2654 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 33,707 psi | 53% | 2552 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,034 psi | 69% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,705 psi | 79% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,247 psi | 60% | 2582 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,550 psi | 57% | 2582 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,866 psi | 52% | 2490 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,616 psi | 45% | 2392 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,868 psi | 56% | 2625 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,026 psi | 83% | 2841 fps | 95.4% |
| Bofors RP15 | <<locked>> | 84% | 36,245 psi | 57% | 2572 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 39,015 psi | 61% | 2671 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 36,550 psi | 57% | 2582 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 48,602 psi | 76% | 2720 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 38,493 psi | 60% | 2618 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 47,471 psi | 74% | 2762 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 50,140 psi | 79% | 2779 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 44,701 psi | 70% | 2703 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,845 psi | 69% | 2684 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,524 psi | 65% | 2608 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,361 psi | 57% | 2654 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 46,978 psi | 74% | 2785 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1608 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,947 psi | 69% | 2651 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,995 psi | 78% | 2746 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 43,743 psi | 69% | 2664 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,482 psi | 68% | 2641 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 40,190 psi | 63% | 2671 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 47,514 psi | 74% | 2694 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 45,788 psi | 72% | 2680 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 29,486 psi | 46% | 2339 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 44,019 psi | 69% | 2687 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 34,432 psi | 54% | 2598 fps | 95.8% |
| Norma MRP | 59.4 gr | 80% | 35,665 psi | 56% | 2585 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 44,976 psi | 70% | 2700 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,769 psi | 62% | 2677 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 43,830 psi | 69% | 2697 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 35,520 psi | 56% | 2556 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,500 psi | 45% | 1647 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,905 psi | 72% | 2736 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,092 psi | 69% | 2756 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,185 psi | 52% | 2566 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,064 psi | 72% | 2848 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 52,866 psi | 83% | 2776 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,581 psi | 62% | 2569 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 37,594 psi | 59% | 2566 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 48,602 psi | 76% | 2720 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,514 psi | 74% | 2694 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 45,788 psi | 72% | 2680 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,736 psi | 83% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,543 psi | 73% | 2644 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,260 psi | 58% | 2562 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 52,634 psi | 82% | 2769 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,149 psi | 68% | 2615 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,930 psi | 66% | 2657 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,290 psi | 60% | 2556 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 50,357 psi | 79% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,354 psi | 73% | 2697 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,404 psi | 55% | 2484 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 45,876 psi | 72% | 2700 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,883 psi | 58% | 2566 fps | 99.5% |
| Vihtavuori N560 | 63.9 gr | 86% | 44,266 psi | 69% | 2766 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 41,307 psi | 65% | 2690 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 47,413 psi | 74% | 2858 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,527 psi | 71% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,674 psi | 75% | 2766 fps | 99.3% |
| Winchester StaBALL HD | 58.8 gr | 80% | 29,211 psi | 46% | 2503 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,347 psi | 59% | 2536 fps | 95.5% |
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 79 powders for 7 mm Weath. Mag. loaded with the .284 | 160gr | NorthFork Bonded Core. Winchester StaBALL HD delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,045 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 1:10.0 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | NorthFork Bonded Core 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.