Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 177gr | Brenneke TIG bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Accurate High Country.
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>> | 92% | 57,667 psi | 90% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,926 psi | 86% | 2733 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 55,608 psi | 87% | 2861 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 90% | 56,405 psi | 88% | 2864 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 55,796 psi | 87% | 2799 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 57,493 psi | 90% | 2864 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 2835 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 2799 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,869 psi | 88% | 2792 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,057 psi | 88% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,259 psi | 87% | 2785 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,012 psi | 85% | 2802 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,593 psi | 87% | 2772 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,172 psi | 86% | 2838 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,854 psi | 88% | 2854 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2851 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,766 psi | 86% | 2769 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 56,898 psi | 89% | 2844 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 54,781 psi | 86% | 2844 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 54,012 psi | 85% | 2802 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,507 psi | 89% | 2733 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,985 psi | 89% | 2854 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 56,405 psi | 88% | 2789 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,971 psi | 89% | 2799 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,956 psi | 88% | 2782 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,202 psi | 88% | 2710 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 53,911 psi | 84% | 2913 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,826 psi | 89% | 2825 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 59% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,853 psi | 86% | 2720 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,317 psi | 87% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,624 psi | 90% | 2779 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 55,448 psi | 87% | 2844 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,426 psi | 71% | 2707 fps | 98.4% |
| Lovex S065 | <<locked>> | 82% | 55,303 psi | 87% | 2700 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,101 psi | 89% | 2749 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,332 psi | 87% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,985 psi | 88% | 2779 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 45,934 psi | 72% | 2733 fps | 99.8% |
| Norma MRP | <<locked>> | 90% | 57,624 psi | 90% | 2874 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,826 psi | 89% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,536 psi | 89% | 2867 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 55,782 psi | 87% | 2776 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,766 psi | 86% | 2799 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1768 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,042 psi | 86% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,290 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,447 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,650 psi | 84% | 2864 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 56,608 psi | 89% | 2766 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 54,882 psi | 86% | 2776 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 56,507 psi | 89% | 2733 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,303 psi | 87% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,101 psi | 89% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,157 psi | 85% | 2654 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,491 psi | 85% | 2772 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 54,230 psi | 85% | 2703 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 54,099 psi | 85% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,317 psi | 87% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,853 psi | 86% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,911 psi | 86% | 2733 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,305 psi | 90% | 2799 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 84% | 57,638 psi | 90% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,725 psi | 90% | 2799 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,246 psi | 90% | 2877 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 96% | 57,624 psi | 90% | 2864 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 54,505 psi | 85% | 2864 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 2923 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,186 psi | 85% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,405 psi | 88% | 2789 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,157 psi | 85% | 2851 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,129 psi | 86% | 2746 fps | 99.8% |
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% | 38,827 psi | 61% | 2454 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 51,474 psi | 81% | 2684 fps | 100% |
| Accurate High Country | 61.1 gr | 80% | 42,148 psi | 66% | 2618 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 80% | 39,668 psi | 62% | 2556 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 42,641 psi | 67% | 2572 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 38,174 psi | 60% | 2510 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 88% | 37,028 psi | 58% | 2487 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 29,486 psi | 46% | 2336 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,221 psi | 68% | 2575 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,110 psi | 77% | 2684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,830 psi | 67% | 2569 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,682 psi | 61% | 2520 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,434 psi | 59% | 2474 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,256 psi | 51% | 2398 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,495 psi | 65% | 2621 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,443 psi | 76% | 2785 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,556 psi | 71% | 2605 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 35,969 psi | 56% | 2457 fps | 96.4% |
| Bofors RP30 | <<locked>> | 84% | 34,171 psi | 54% | 2444 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 38,682 psi | 61% | 2520 fps | 97.5% |
| Bofors RP7 | <<locked>> | 80% | 53,200 psi | 83% | 2680 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 35,360 psi | 55% | 2448 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 52,808 psi | 83% | 2733 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,741 psi | 64% | 2516 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,001 psi | 63% | 2500 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,238 psi | 72% | 2566 fps | 100% |
| Hodgdon Retumbo | 58.9 gr | 80% | 31,589 psi | 50% | 2425 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 52,895 psi | 83% | 2766 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 44% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,385 psi | 76% | 2618 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 48,675 psi | 76% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,090 psi | 66% | 2510 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 36,883 psi | 58% | 2490 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,795 psi | 55% | 2480 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 52,069 psi | 82% | 2651 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,415 psi | 79% | 2648 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,504 psi | 53% | 2336 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 48,994 psi | 77% | 2667 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 30,501 psi | 48% | 2388 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 40,698 psi | 64% | 2585 fps | 99% |
| Norma URP | <<locked>> | 80% | 49,980 psi | 78% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,550 psi | 57% | 2497 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 48,921 psi | 77% | 2671 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,648 psi | 51% | 2382 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 45% | 1581 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,474 psi | 81% | 2703 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,705 psi | 78% | 2726 fps | 100% |
| ReloadSwiss RS 76 | 63 gr | 80% | 30,545 psi | 48% | 2395 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,769 psi | 62% | 2608 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 43,816 psi | 69% | 2549 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 42,177 psi | 66% | 2556 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 53,200 psi | 83% | 2680 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,069 psi | 82% | 2651 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,415 psi | 79% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,937 psi | 80% | 2608 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,843 psi | 66% | 2549 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 44,643 psi | 70% | 2543 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 47,355 psi | 74% | 2618 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,714 psi | 67% | 2536 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 51,561 psi | 81% | 2657 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,231 psi | 58% | 2421 fps | 97.6% |
| Vihtavuori N170 | <<locked>> | 96% | 53,664 psi | 84% | 2743 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 50,676 psi | 79% | 2661 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,771 psi | 65% | 2546 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,640 psi | 64% | 2575 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 38,551 psi | 60% | 2520 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 41,118 psi | 64% | 2621 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 96% | 48,051 psi | 75% | 2792 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,546 psi | 79% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,808 psi | 83% | 2733 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,330 psi | 54% | 2516 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,160 psi | 61% | 2467 fps | 97.5% |
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 72 powders for 7 mm Weath. Mag. loaded with the .284 | 177gr | Brenneke TIG. Vihtavuori N570 delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,923 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 177.0 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-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Accurate High Country rank at the top here: for 7 mm Weath. Mag. with the .284 | 177gr | Brenneke TIG 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.