Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 174gr | Prvi Partizan SP bullet and 71 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 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% | 56,391 psi | 88% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,450 psi | 90% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,839 psi | 86% | 2858 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 88% | 54,331 psi | 85% | 2792 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 55,970 psi | 88% | 2858 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2828 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,443 psi | 76% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,752 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,508 psi | 90% | 2838 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,202 psi | 88% | 2854 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,580 psi | 90% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,145 psi | 90% | 2884 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,389 psi | 85% | 2854 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 2838 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,000 psi | 89% | 2818 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 55,376 psi | 87% | 2841 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 2897 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 56,202 psi | 88% | 2854 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,390 psi | 87% | 2730 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,492 psi | 87% | 2851 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 55,187 psi | 86% | 2785 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,537 psi | 90% | 2799 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,767 psi | 87% | 2799 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,505 psi | 85% | 2779 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,926 psi | 86% | 2713 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,072 psi | 88% | 2966 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,521 psi | 87% | 2822 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1739 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,305 psi | 90% | 2776 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,768 psi | 89% | 2753 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,551 psi | 90% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,536 psi | 89% | 2779 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 92% | 54,157 psi | 85% | 2841 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,976 psi | 69% | 2700 fps | 97.9% |
| Lovex S065 | <<locked>> | 82% | 54,172 psi | 85% | 2703 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,941 psi | 88% | 2749 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,711 psi | 90% | 2782 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,781 psi | 86% | 2779 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2726 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 56,260 psi | 88% | 2874 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,564 psi | 87% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,868 psi | 86% | 2861 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 54,534 psi | 85% | 2776 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,174 psi | 90% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1781 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,450 psi | 90% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,680 psi | 87% | 2835 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,753 psi | 89% | 2959 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2917 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 55,434 psi | 87% | 2766 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 57,145 psi | 90% | 2828 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,390 psi | 87% | 2730 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,172 psi | 85% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,941 psi | 88% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,710 psi | 89% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,710 psi | 89% | 2822 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,724 psi | 89% | 2759 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 56,507 psi | 89% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,580 psi | 90% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,348 psi | 90% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,232 psi | 90% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,463 psi | 88% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,362 psi | 88% | 2799 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,941 psi | 88% | 2874 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 56,086 psi | 88% | 2858 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 2917 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2910 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,637 psi | 89% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,187 psi | 86% | 2785 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,260 psi | 88% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,522 psi | 90% | 2799 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% | 37,768 psi | 59% | 2448 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 50,212 psi | 79% | 2680 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 41,539 psi | 65% | 2615 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,771 psi | 65% | 2569 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 37,231 psi | 58% | 2503 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 88% | 36,158 psi | 57% | 2477 fps | 95% |
| ADI AR 2225 | <<locked>> | 86% | 30,705 psi | 48% | 2385 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,066 psi | 75% | 2687 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,785 psi | 65% | 2566 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,608 psi | 59% | 2513 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,347 psi | 57% | 2470 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,531 psi | 49% | 2395 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,205 psi | 63% | 2615 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,818 psi | 73% | 2772 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,340 psi | 74% | 2651 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 34,954 psi | 55% | 2448 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 35,418 psi | 56% | 2490 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 37,608 psi | 59% | 2513 fps | 96.9% |
| Bofors RP7 | <<locked>> | 80% | 52,083 psi | 82% | 2680 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,476 psi | 54% | 2438 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 51,619 psi | 81% | 2730 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,911 psi | 84% | 2743 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,755 psi | 62% | 2510 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,044 psi | 61% | 2493 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,266 psi | 71% | 2569 fps | 100% |
| Hodgdon Retumbo | 59.8 gr | 82% | 32,909 psi | 52% | 2477 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 51,677 psi | 81% | 2762 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 44% | 1552 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,543 psi | 75% | 2621 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,432 psi | 84% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,500 psi | 74% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,336 psi | 65% | 2510 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 38,493 psi | 60% | 2543 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,897 psi | 56% | 2523 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 50,981 psi | 80% | 2651 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,327 psi | 77% | 2648 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,547 psi | 51% | 2329 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 47,877 psi | 75% | 2664 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 31,575 psi | 49% | 2434 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 39,552 psi | 62% | 2582 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 48,776 psi | 76% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,534 psi | 56% | 2487 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 47,819 psi | 75% | 2671 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,749 psi | 50% | 2372 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 45% | 1588 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,227 psi | 79% | 2703 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,428 psi | 76% | 2726 fps | 100% |
| ReloadSwiss RS 76 | 62.4 gr | 80% | 29,718 psi | 47% | 2382 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,292 psi | 65% | 2657 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 43,004 psi | 67% | 2549 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 41,104 psi | 64% | 2549 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,083 psi | 82% | 2680 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,981 psi | 80% | 2651 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,327 psi | 77% | 2648 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,922 psi | 78% | 2605 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,770 psi | 64% | 2546 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 43,714 psi | 69% | 2539 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 46,311 psi | 73% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,655 psi | 65% | 2533 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 50,386 psi | 79% | 2657 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,260 psi | 57% | 2415 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 49,530 psi | 78% | 2661 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,611 psi | 64% | 2543 fps | 100% |
| Vihtavuori N560 | 60.5 gr | 80% | 39,552 psi | 62% | 2569 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 37,304 psi | 58% | 2510 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 42,714 psi | 67% | 2671 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 49,980 psi | 78% | 2844 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,458 psi | 78% | 2618 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,851 psi | 81% | 2736 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,982 psi | 52% | 2507 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,159 psi | 60% | 2464 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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 174gr | Prvi Partizan SP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,739 fps to 2,966 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 174.0 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 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 174gr | Prvi Partizan SP 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.