Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Speer TBBC bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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% | 55,463 psi | 87% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,971 psi | 89% | 2890 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,855 psi | 89% | 3009 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 92% | 53,940 psi | 85% | 2949 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 57,682 psi | 90% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,551 psi | 90% | 2946 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 55,172 psi | 86% | 2949 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,487 psi | 78% | 2848 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,193 psi | 69% | 2808 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,056 psi | 85% | 2887 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,566 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,085 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,101 psi | 89% | 2936 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,201 psi | 87% | 2946 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,391 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,738 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,000 psi | 89% | 3009 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,029 psi | 89% | 2913 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 54,389 psi | 85% | 2930 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,793 psi | 81% | 2920 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 55,201 psi | 87% | 2946 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 55,477 psi | 87% | 2838 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2936 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 54,795 psi | 86% | 2887 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,421 psi | 90% | 2900 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 55,143 psi | 86% | 2887 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,740 psi | 90% | 2930 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,230 psi | 85% | 2815 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3051 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,143 psi | 86% | 2923 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,188 psi | 90% | 2877 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,884 psi | 89% | 2858 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,145 psi | 90% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,217 psi | 88% | 2874 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 56,797 psi | 89% | 2986 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 57,551 psi | 90% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,796 psi | 87% | 2854 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,550 psi | 89% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,505 psi | 85% | 2877 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 39,827 psi | 62% | 2733 fps | 97.9% |
| Norma MRP | <<locked>> | 92% | 55,042 psi | 86% | 2966 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,230 psi | 87% | 2871 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,725 psi | 90% | 3012 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 54,056 psi | 85% | 2877 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,144 psi | 88% | 2943 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,043 psi | 60% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,811 psi | 89% | 2913 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,100 psi | 86% | 2943 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3051 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 2930 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 82% | 56,782 psi | 89% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,027 psi | 86% | 2858 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 56,652 psi | 89% | 2927 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 55,477 psi | 87% | 2838 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,551 psi | 90% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,796 psi | 87% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,608 psi | 89% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,855 psi | 89% | 2812 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,217 psi | 88% | 2920 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,449 psi | 88% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,492 psi | 89% | 2854 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 55,782 psi | 87% | 2877 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,087 psi | 89% | 2897 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 54,056 psi | 85% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,072 psi | 89% | 2867 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,521 psi | 89% | 2877 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,115 psi | 88% | 2871 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,259 psi | 87% | 2894 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,882 psi | 86% | 2963 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 54,868 psi | 86% | 2943 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2933 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,550 psi | 89% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,998 psi | 86% | 2894 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,302 psi | 85% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,927 psi | 89% | 2894 fps | 99.5% |
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% | 34,548 psi | 54% | 2470 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 46,267 psi | 73% | 2723 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 40,132 psi | 63% | 2690 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 86% | 43,801 psi | 69% | 2759 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 54,244 psi | 85% | 2795 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,551 psi | 60% | 2595 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 42,134 psi | 66% | 2703 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 94% | 40,625 psi | 64% | 2667 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 90% | 32,053 psi | 50% | 2503 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,943 psi | 61% | 2598 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,469 psi | 70% | 2733 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,372 psi | 81% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,580 psi | 60% | 2592 fps | 96% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,883 psi | 58% | 2592 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,228 psi | 52% | 2500 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,892 psi | 45% | 2402 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,419 psi | 57% | 2638 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,650 psi | 84% | 2854 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 36,767 psi | 58% | 2585 fps | 95.3% |
| Bofors RP30 | <<locked>> | 92% | 39,537 psi | 62% | 2680 fps | 95.6% |
| Bofors RP5 | <<locked>> | 82% | 36,883 psi | 58% | 2592 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 48,965 psi | 77% | 2726 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 38,899 psi | 61% | 2631 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 47,848 psi | 75% | 2772 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 50,517 psi | 79% | 2789 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 42,163 psi | 66% | 2654 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,179 psi | 69% | 2694 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,945 psi | 66% | 2615 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,651 psi | 57% | 2664 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,558 psi | 75% | 2799 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 44% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,295 psi | 69% | 2657 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,357 psi | 79% | 2753 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 44,135 psi | 69% | 2671 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,801 psi | 69% | 2651 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 86% | 40,524 psi | 64% | 2680 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 47,892 psi | 75% | 2703 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,166 psi | 72% | 2690 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 29,805 psi | 47% | 2349 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 44,353 psi | 70% | 2697 fps | 97.5% |
| Norma 217 | <<locked>> | 96% | 34,867 psi | 55% | 2612 fps | 96% |
| Norma MRP | 59.9 gr | 80% | 35,998 psi | 56% | 2598 fps | 96.7% |
| Norma URP | <<locked>> | 80% | 45,382 psi | 71% | 2710 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 40,277 psi | 63% | 2690 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 44,193 psi | 69% | 2707 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 33,533 psi | 53% | 2507 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 45% | 1647 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,282 psi | 73% | 2746 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,454 psi | 70% | 2762 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,591 psi | 53% | 2579 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,294 psi | 68% | 2795 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 53,301 psi | 84% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,914 psi | 63% | 2575 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 37,956 psi | 59% | 2575 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 48,965 psi | 77% | 2726 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,892 psi | 75% | 2703 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,166 psi | 72% | 2690 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,156 psi | 83% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,934 psi | 74% | 2651 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,666 psi | 59% | 2572 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 53,055 psi | 83% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,395 psi | 68% | 2625 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 42,409 psi | 66% | 2667 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,624 psi | 61% | 2562 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 50,763 psi | 80% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,746 psi | 73% | 2703 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,737 psi | 56% | 2493 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 46,224 psi | 72% | 2707 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,275 psi | 58% | 2575 fps | 99.6% |
| Vihtavuori N560 | 62.9 gr | 84% | 41,597 psi | 65% | 2710 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 41,829 psi | 66% | 2703 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 98% | 47,877 psi | 75% | 2871 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,847 psi | 72% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,095 psi | 75% | 2776 fps | 99.4% |
| Winchester StaBALL HD | 59.3 gr | 80% | 29,501 psi | 46% | 2513 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,652 psi | 59% | 2543 fps | 95.7% |
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 76 powders for 7 mm Weath. Mag. loaded with the .284 | 160gr | Speer TBBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,051 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,051 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 1:10.5 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | Speer TBBC 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.