Load Specifications
Load data in caliber 7 mm Weath. Mag. with .283 | 160gr | Rhino Penetrator 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% | 54,201 psi | 85% | 2835 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,724 psi | 87% | 2871 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,593 psi | 87% | 2982 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 94% | 56,565 psi | 89% | 2986 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 56,768 psi | 89% | 2828 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,246 psi | 88% | 2923 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 53,998 psi | 85% | 2927 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,530 psi | 76% | 2825 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,120 psi | 68% | 2782 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,579 psi | 89% | 2920 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,594 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,896 psi | 84% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,869 psi | 88% | 2913 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 53,969 psi | 85% | 2923 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,100 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,534 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,680 psi | 87% | 2989 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,014 psi | 88% | 2890 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 56,753 psi | 89% | 2966 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,343 psi | 79% | 2894 fps | 98.4% |
| Bofors RP5 | <<locked>> | 94% | 53,969 psi | 85% | 2923 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 54,621 psi | 86% | 2818 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,345 psi | 84% | 2910 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 57,479 psi | 90% | 2927 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,362 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 54,012 psi | 85% | 2867 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,579 psi | 89% | 2907 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,710 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,287 psi | 84% | 3025 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 53,853 psi | 84% | 2904 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1791 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,956 psi | 88% | 2854 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,072 psi | 88% | 2841 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,028 psi | 88% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,129 psi | 86% | 2851 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 55,593 psi | 87% | 2966 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 56,710 psi | 89% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,737 psi | 86% | 2835 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,058 psi | 89% | 2910 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2707 fps | 97.5% |
| Norma MRP | <<locked>> | 94% | 57,725 psi | 90% | 3005 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,624 psi | 90% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,449 psi | 88% | 2986 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 56,536 psi | 89% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,723 psi | 86% | 2920 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1837 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,334 psi | 90% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,695 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,725 psi | 90% | 2976 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,012 psi | 85% | 3025 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2900 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 55,767 psi | 87% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,624 psi | 90% | 2897 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 55,332 psi | 87% | 2904 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 54,621 psi | 86% | 2818 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,710 psi | 89% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,737 psi | 86% | 2835 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,203 psi | 90% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,666 psi | 87% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,883 psi | 88% | 2792 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,897 psi | 86% | 2897 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 55,506 psi | 87% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,492 psi | 87% | 2831 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 54,273 psi | 85% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,912 psi | 88% | 2877 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 56,666 psi | 89% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,941 psi | 88% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,332 psi | 87% | 2854 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 55,085 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,522 psi | 90% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,551 psi | 90% | 3002 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 2976 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 2910 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,347 psi | 87% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,479 psi | 90% | 2927 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,739 psi | 89% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,767 psi | 87% | 2871 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% | 33,765 psi | 53% | 2448 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 45,295 psi | 71% | 2700 fps | 100% |
| Accurate High Country | 61.7 gr | 84% | 42,047 psi | 66% | 2730 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 88% | 45,803 psi | 72% | 2795 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 53,345 psi | 84% | 2779 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,782 psi | 59% | 2572 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 41,249 psi | 65% | 2680 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 42,424 psi | 66% | 2700 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 92% | 33,431 psi | 52% | 2543 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,145 psi | 60% | 2575 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,526 psi | 68% | 2710 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,169 psi | 79% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,797 psi | 59% | 2569 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,129 psi | 57% | 2569 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,430 psi | 51% | 2480 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,297 psi | 44% | 2379 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,433 psi | 56% | 2612 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,605 psi | 82% | 2828 fps | 95.2% |
| Bofors RP15 | <<locked>> | 86% | 38,305 psi | 60% | 2618 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 38,435 psi | 60% | 2654 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 36,129 psi | 57% | 2569 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 48,109 psi | 75% | 2707 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 37,985 psi | 60% | 2605 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 46,992 psi | 74% | 2753 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 49,661 psi | 78% | 2769 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 44,063 psi | 69% | 2687 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,250 psi | 68% | 2671 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,031 psi | 64% | 2595 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,839 psi | 56% | 2638 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 46,514 psi | 73% | 2776 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 44% | 1604 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,540 psi | 68% | 2638 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,516 psi | 78% | 2733 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 43,250 psi | 68% | 2651 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,888 psi | 67% | 2628 fps | 95.4% |
| IMR 7828 SSC | 62.3 gr | 88% | 42,540 psi | 67% | 2720 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 47,021 psi | 74% | 2684 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 45,295 psi | 71% | 2674 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 29,211 psi | 46% | 2329 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 43,569 psi | 68% | 2677 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 33,939 psi | 53% | 2585 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 35,215 psi | 55% | 2575 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 44,454 psi | 70% | 2690 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 39,363 psi | 62% | 2664 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 43,381 psi | 68% | 2687 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 35,027 psi | 55% | 2539 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,471 psi | 45% | 1644 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,272 psi | 83% | 2871 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,179 psi | 71% | 2723 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,424 psi | 68% | 2740 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,735 psi | 51% | 2552 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,310 psi | 71% | 2835 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 52,301 psi | 82% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,785 psi | 65% | 2612 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 37,159 psi | 58% | 2556 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 48,109 psi | 75% | 2707 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,021 psi | 74% | 2684 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 45,295 psi | 71% | 2674 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,708 psi | 84% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,446 psi | 82% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,151 psi | 72% | 2635 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,840 psi | 58% | 2549 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 52,127 psi | 82% | 2762 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,583 psi | 67% | 2602 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 41,423 psi | 65% | 2648 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,869 psi | 59% | 2543 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 49,850 psi | 78% | 2684 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,861 psi | 72% | 2684 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,012 psi | 55% | 2474 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,368 psi | 71% | 2690 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,376 psi | 57% | 2552 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 43,656 psi | 68% | 2753 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 40,727 psi | 64% | 2677 fps | 95% |
| Vihtavuori N568 | <<locked>> | 98% | 46,659 psi | 73% | 2844 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,918 psi | 70% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,195 psi | 74% | 2756 fps | 99.2% |
| Winchester StaBALL HD | 58.2 gr | 80% | 28,863 psi | 45% | 2490 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,927 psi | 58% | 2523 fps | 95.3% |
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 .283 | 160gr | Rhino Penetrator. Winchester StaBALL HD delivers the highest muzzle velocity at 3,035 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,035 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 0.283" calls for a 1:9.5 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 High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Weath. Mag. with the .283 | 160gr | Rhino Penetrator 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.