Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 184gr | Berger F-Open Hybrid Target bullet and 73 powders. The key underlying parameters are shown in the table above.
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% | 55,709 psi | 87% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,869 psi | 89% | 2697 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,276 psi | 90% | 2825 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 54,230 psi | 85% | 2769 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 90% | 57,609 psi | 90% | 2759 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 55,419 psi | 87% | 2769 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2740 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,790 psi | 75% | 2703 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,288 psi | 85% | 2697 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,971 psi | 89% | 2746 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,622 psi | 87% | 2766 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,130 psi | 90% | 2730 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,608 psi | 89% | 2795 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,725 psi | 90% | 2818 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2753 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,565 psi | 89% | 2733 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 54,824 psi | 86% | 2753 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2805 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 55,622 psi | 87% | 2766 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,158 psi | 86% | 2644 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,868 psi | 86% | 2762 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 54,679 psi | 86% | 2697 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,985 psi | 89% | 2707 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,100 psi | 86% | 2707 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,085 psi | 85% | 2690 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,360 psi | 85% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,405 psi | 87% | 2871 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,071 psi | 86% | 2736 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1673 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,956 psi | 89% | 2687 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,565 psi | 89% | 2667 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,159 psi | 90% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,999 psi | 88% | 2690 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 57,363 psi | 90% | 2808 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,294 psi | 68% | 2618 fps | 98.1% |
| Lovex S065 | <<locked>> | 84% | 57,159 psi | 90% | 2661 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,608 psi | 87% | 2664 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,087 psi | 89% | 2694 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,288 psi | 85% | 2690 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 43,758 psi | 69% | 2644 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 55,477 psi | 87% | 2782 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,259 psi | 87% | 2677 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,157 psi | 85% | 2769 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 57,609 psi | 90% | 2740 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,434 psi | 88% | 2762 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,985 psi | 89% | 2720 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,317 psi | 87% | 2749 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,115 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 2828 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 54,969 psi | 86% | 2677 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 56,797 psi | 89% | 2740 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,158 psi | 86% | 2644 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,159 psi | 90% | 2661 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,608 psi | 87% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,260 psi | 88% | 2621 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,376 psi | 88% | 2736 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,275 psi | 88% | 2674 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 56,086 psi | 88% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,101 psi | 89% | 2713 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,290 psi | 90% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,826 psi | 89% | 2667 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,768 psi | 89% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,086 psi | 88% | 2677 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,622 psi | 87% | 2707 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,172 psi | 86% | 2782 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 55,419 psi | 87% | 2769 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2831 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2822 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,173 psi | 88% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,955 psi | 86% | 2700 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,593 psi | 87% | 2815 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,101 psi | 89% | 2710 fps | 99.9% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,507 psi | 59% | 2375 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 49,879 psi | 78% | 2598 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,524 psi | 64% | 2530 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 41,089 psi | 64% | 2536 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 41,466 psi | 65% | 2490 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 36,883 psi | 58% | 2425 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 35,795 psi | 56% | 2402 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 84% | 28,471 psi | 45% | 2257 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,601 psi | 75% | 2598 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,524 psi | 65% | 2487 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,217 psi | 58% | 2434 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,129 psi | 57% | 2395 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,270 psi | 49% | 2326 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,827 psi | 62% | 2539 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,296 psi | 73% | 2694 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,949 psi | 74% | 2569 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 34,838 psi | 55% | 2379 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 35,099 psi | 55% | 2418 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 37,217 psi | 58% | 2434 fps | 97.2% |
| Bofors RP7 | <<locked>> | 80% | 51,721 psi | 81% | 2592 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,185 psi | 54% | 2365 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 51,242 psi | 80% | 2644 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,432 psi | 84% | 2654 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,407 psi | 62% | 2431 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,624 psi | 61% | 2415 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,020 psi | 71% | 2487 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 32,474 psi | 51% | 2398 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 51,010 psi | 80% | 2674 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 44% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,253 psi | 74% | 2536 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,113 psi | 83% | 2615 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,181 psi | 74% | 2543 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,089 psi | 64% | 2431 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 35,665 psi | 56% | 2408 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,592 psi | 56% | 2451 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,807 psi | 80% | 2569 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,197 psi | 77% | 2566 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,372 psi | 51% | 2260 fps | 98% |
| Norma 204 | <<locked>> | 80% | 47,326 psi | 74% | 2575 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 29,225 psi | 46% | 2306 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 39,073 psi | 61% | 2500 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 48,646 psi | 76% | 2582 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,273 psi | 55% | 2411 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,268 psi | 74% | 2582 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,401 psi | 49% | 2303 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 45% | 1529 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,734 psi | 78% | 2618 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,776 psi | 75% | 2635 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 29,356 psi | 46% | 2310 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,799 psi | 64% | 2579 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 42,656 psi | 67% | 2467 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,785 psi | 64% | 2470 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,721 psi | 81% | 2592 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,807 psi | 80% | 2569 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,197 psi | 77% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,676 psi | 78% | 2523 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,451 psi | 63% | 2467 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 43,207 psi | 68% | 2457 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 45,963 psi | 72% | 2539 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,263 psi | 65% | 2454 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,969 psi | 85% | 2559 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,096 psi | 79% | 2575 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,027 psi | 56% | 2339 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 49,168 psi | 77% | 2575 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,422 psi | 63% | 2464 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,088 psi | 61% | 2490 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 37,028 psi | 58% | 2434 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 42,221 psi | 66% | 2592 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 98% | 49,400 psi | 77% | 2759 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,936 psi | 77% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,242 psi | 80% | 2644 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,445 psi | 51% | 2428 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,811 psi | 59% | 2385 fps | 97.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for 7 mm Weath. Mag. loaded with the .284 | 184gr | Berger F-Open Hybrid Target. Hodgdon Retumbo delivers the highest muzzle velocity at 2,871 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,871 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 184.0 gr projectile in 0.284" calls for a 1:9.0 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.