Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Winchester FailSafe bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand and Alliant Reloder-26.
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>> | 94% | 56,391 psi | 88% | 2874 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,479 psi | 90% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,824 psi | 86% | 2963 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 54,636 psi | 86% | 2907 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 56,057 psi | 88% | 2966 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,227 psi | 79% | 2864 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,904 psi | 70% | 2825 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,955 psi | 86% | 2904 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,752 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,912 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,740 psi | 90% | 2949 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,144 psi | 88% | 2963 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,392 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,041 psi | 85% | 2966 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,609 psi | 90% | 2927 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 55,259 psi | 87% | 2949 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 2933 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 56,144 psi | 88% | 2963 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 56,188 psi | 88% | 2851 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,405 psi | 87% | 2953 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,477 psi | 87% | 2904 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 54,462 psi | 85% | 2858 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 56,028 psi | 88% | 2907 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,766 psi | 86% | 2887 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,027 psi | 86% | 2828 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,579 psi | 87% | 3068 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,825 psi | 87% | 2940 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,159 psi | 58% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,230 psi | 85% | 2835 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,566 psi | 90% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,143 psi | 85% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,768 psi | 89% | 2884 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 57,740 psi | 90% | 3005 fps | 99.2% |
| Lovex S065 | <<locked>> | 84% | 54,839 psi | 86% | 2818 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,478 psi | 89% | 2867 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,172 psi | 86% | 2890 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 40,582 psi | 64% | 2753 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 55,985 psi | 88% | 2982 fps | 100% |
| Norma URP | <<locked>> | 86% | 55,956 psi | 88% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,520 psi | 85% | 2966 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 54,795 psi | 86% | 2890 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,000 psi | 89% | 2959 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 60% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,522 psi | 90% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,854 psi | 88% | 2953 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3068 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 2949 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 57,595 psi | 90% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,724 psi | 87% | 2874 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 57,334 psi | 90% | 2940 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 56,188 psi | 88% | 2851 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,839 psi | 86% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,478 psi | 89% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,130 psi | 90% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,508 psi | 90% | 2825 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,898 psi | 89% | 2936 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 56,985 psi | 89% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,290 psi | 90% | 2867 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 56,594 psi | 89% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,740 psi | 90% | 2910 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 54,795 psi | 86% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,551 psi | 90% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,334 psi | 90% | 2890 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 56,811 psi | 89% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,043 psi | 88% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,782 psi | 87% | 2979 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 55,680 psi | 87% | 2959 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 2956 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,159 psi | 90% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,477 psi | 87% | 2904 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,376 psi | 87% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,896 psi | 84% | 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% | 35,172 psi | 55% | 2487 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 47,050 psi | 74% | 2740 fps | 100% |
| Accurate MAGPRO | 66.5 gr | 86% | 44,411 psi | 70% | 2772 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 39,204 psi | 61% | 2612 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 40,045 psi | 63% | 2661 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 41,147 psi | 64% | 2680 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 32,489 psi | 51% | 2520 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,581 psi | 62% | 2612 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,034 psi | 71% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,953 psi | 81% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,218 psi | 61% | 2608 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,550 psi | 59% | 2608 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,721 psi | 53% | 2513 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,414 psi | 46% | 2418 fps | 95.9% |
| Alliant Reloder-26 | 62.5 gr | 80% | 36,941 psi | 58% | 2648 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,850 psi | 80% | 2808 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 37,231 psi | 58% | 2598 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 40,118 psi | 63% | 2697 fps | 95.9% |
| Bofors RP5 | <<locked>> | 82% | 37,550 psi | 59% | 2608 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,472 psi | 78% | 2740 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,421 psi | 62% | 2648 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 48,573 psi | 76% | 2785 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,024 psi | 80% | 2802 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 42,786 psi | 67% | 2667 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,003 psi | 66% | 2651 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,482 psi | 67% | 2628 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,925 psi | 55% | 2618 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 48,225 psi | 76% | 2812 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 44% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,962 psi | 70% | 2674 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,821 psi | 80% | 2766 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 44,657 psi | 70% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,568 psi | 65% | 2608 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 41,133 psi | 64% | 2697 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 48,385 psi | 76% | 2713 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 46,673 psi | 73% | 2703 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 30,284 psi | 47% | 2362 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 45,049 psi | 71% | 2710 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 33,199 psi | 52% | 2566 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 36,622 psi | 57% | 2612 fps | 97% |
| Norma URP | <<locked>> | 80% | 45,890 psi | 72% | 2723 fps | 100% |
| Ramshot Grand | 64.7 gr | 86% | 40,872 psi | 64% | 2707 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 44,904 psi | 70% | 2723 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,040 psi | 53% | 2520 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 45% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,036 psi | 74% | 2759 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,136 psi | 71% | 2776 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,026 psi | 53% | 2595 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,005 psi | 69% | 2808 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 53,853 psi | 84% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,567 psi | 64% | 2595 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,450 psi | 60% | 2589 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 49,472 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% | 46,673 psi | 73% | 2703 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,708 psi | 84% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,369 psi | 74% | 2664 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,130 psi | 60% | 2585 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 53,650 psi | 84% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,947 psi | 69% | 2638 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 43,163 psi | 68% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,059 psi | 61% | 2575 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 51,285 psi | 80% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,485 psi | 74% | 2720 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,910 psi | 53% | 2451 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 46,673 psi | 73% | 2720 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,797 psi | 59% | 2589 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 42,235 psi | 66% | 2726 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 42,409 psi | 66% | 2717 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 45,411 psi | 71% | 2822 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,485 psi | 73% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,791 psi | 76% | 2792 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,023 psi | 47% | 2533 fps | 99.9% |
| 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 74 powders for 7 mm Weath. Mag. loaded with the .284 | 160gr | Winchester FailSafe. 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 74 of the 74 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | Winchester FailSafe 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.