Load Specifications
Load data in caliber 7 mm Weath. Mag. with .285 | 173gr | Prvi Partizan FMJ BT bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 76, Hodgdon Retumbo 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>> | 92% | 56,449 psi | 88% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,624 psi | 90% | 2799 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 55,129 psi | 86% | 2871 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 88% | 54,447 psi | 85% | 2805 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 56,028 psi | 88% | 2871 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 2835 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,472 psi | 76% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,911 psi | 86% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,595 psi | 90% | 2848 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,304 psi | 88% | 2864 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,128 psi | 85% | 2779 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,435 psi | 90% | 2897 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,462 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,633 psi | 79% | 2851 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,246 psi | 90% | 2831 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 55,492 psi | 87% | 2851 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 2904 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 56,304 psi | 88% | 2864 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,564 psi | 87% | 2743 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,738 psi | 87% | 2864 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 55,303 psi | 87% | 2795 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,450 psi | 90% | 2805 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,825 psi | 87% | 2808 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,578 psi | 86% | 2789 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,114 psi | 86% | 2723 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,333 psi | 88% | 2976 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,666 psi | 87% | 2831 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,435 psi | 90% | 2785 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,913 psi | 89% | 2762 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,682 psi | 90% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,623 psi | 89% | 2789 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 92% | 54,230 psi | 85% | 2848 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,976 psi | 69% | 2707 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 57,682 psi | 90% | 2759 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,086 psi | 88% | 2762 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,201 psi | 85% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,897 psi | 86% | 2789 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2733 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 56,362 psi | 88% | 2884 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,753 psi | 87% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,897 psi | 86% | 2867 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 54,665 psi | 86% | 2789 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,479 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 1785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,566 psi | 90% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,014 psi | 88% | 2848 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,014 psi | 89% | 2972 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2930 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 55,564 psi | 87% | 2776 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 57,246 psi | 90% | 2838 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,564 psi | 87% | 2743 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,682 psi | 90% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,086 psi | 88% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,826 psi | 89% | 2720 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,811 psi | 89% | 2835 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 57,000 psi | 89% | 2772 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 56,666 psi | 89% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,653 psi | 90% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,696 psi | 90% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,493 psi | 90% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,261 psi | 90% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,550 psi | 89% | 2776 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,246 psi | 88% | 2805 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,985 psi | 88% | 2884 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 56,115 psi | 88% | 2867 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 2933 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2920 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,724 psi | 89% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,303 psi | 87% | 2795 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,579 psi | 89% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,609 psi | 90% | 2808 fps | 99.9% |
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% | 37,753 psi | 59% | 2457 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 50,183 psi | 79% | 2690 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 41,655 psi | 65% | 2625 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,742 psi | 65% | 2575 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 37,362 psi | 59% | 2513 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 88% | 36,230 psi | 57% | 2487 fps | 95% |
| ADI AR 2225 | <<locked>> | 86% | 30,763 psi | 48% | 2395 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,051 psi | 75% | 2694 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,742 psi | 65% | 2572 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,739 psi | 59% | 2523 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,492 psi | 57% | 2480 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,502 psi | 49% | 2402 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,335 psi | 63% | 2625 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,978 psi | 74% | 2782 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,572 psi | 75% | 2664 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 35,114 psi | 55% | 2457 fps | 95.8% |
| Bofors RP30 | <<locked>> | 86% | 35,491 psi | 56% | 2500 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 37,739 psi | 59% | 2523 fps | 96.9% |
| Bofors RP7 | <<locked>> | 80% | 52,286 psi | 82% | 2690 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,592 psi | 54% | 2448 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 51,779 psi | 81% | 2743 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 54,056 psi | 85% | 2753 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,900 psi | 63% | 2520 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,175 psi | 61% | 2503 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,266 psi | 71% | 2575 fps | 100% |
| Hodgdon Retumbo | 60.1 gr | 82% | 32,866 psi | 52% | 2484 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 51,779 psi | 81% | 2772 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,137 psi | 44% | 1562 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,500 psi | 74% | 2628 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,374 psi | 84% | 2710 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,703 psi | 75% | 2638 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,307 psi | 65% | 2516 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 38,609 psi | 61% | 2552 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,158 psi | 57% | 2536 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,169 psi | 80% | 2664 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,472 psi | 78% | 2657 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,692 psi | 51% | 2339 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 47,805 psi | 75% | 2671 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 31,647 psi | 50% | 2441 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 39,682 psi | 62% | 2589 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 48,979 psi | 77% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,665 psi | 56% | 2497 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 47,747 psi | 75% | 2677 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,821 psi | 50% | 2382 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 45% | 1594 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,183 psi | 79% | 2710 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,327 psi | 76% | 2733 fps | 100% |
| ReloadSwiss RS 76 | 62.8 gr | 80% | 29,776 psi | 47% | 2392 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,495 psi | 65% | 2667 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 42,975 psi | 67% | 2556 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 41,263 psi | 65% | 2562 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,286 psi | 82% | 2690 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,169 psi | 80% | 2664 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,472 psi | 78% | 2657 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,067 psi | 78% | 2618 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,930 psi | 64% | 2556 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 43,642 psi | 68% | 2546 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 46,267 psi | 73% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,814 psi | 66% | 2546 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 54,288 psi | 85% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,343 psi | 79% | 2667 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,230 psi | 57% | 2421 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 49,690 psi | 78% | 2671 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,799 psi | 64% | 2552 fps | 100% |
| Vihtavuori N560 | 60.9 gr | 80% | 39,682 psi | 62% | 2579 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 37,434 psi | 59% | 2520 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 42,960 psi | 67% | 2684 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 50,227 psi | 79% | 2858 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,559 psi | 78% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,779 psi | 81% | 2743 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,996 psi | 52% | 2513 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,276 psi | 60% | 2470 fps | 97% |
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 .285 | 173gr | Prvi Partizan FMJ BT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,976 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,976 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 59–90 %, leaving at least 10 % headroom. The 173.0 gr projectile in 0.285" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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. ReloadSwiss RS 76, Hodgdon Retumbo, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .285 | 173gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron 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.