Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 173gr | RWS H-Mantel bullet and 46 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Somchem S365.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 41,466 psi | 87% | 2444 fps | 97.9% |
| Accurate 4350 | <<locked>> | 88% | 41,017 psi | 86% | 2448 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 43,047 psi | 90% | 2398 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,236 psi | 90% | 2425 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,815 psi | 89% | 2503 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,699 psi | 89% | 2523 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,061 psi | 88% | 2516 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,086 psi | 77% | 2434 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,031 psi | 86% | 2569 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 42,960 psi | 90% | 2431 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 40,930 psi | 86% | 2359 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 86% | 40,698 psi | 85% | 2441 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,163 psi | 88% | 2438 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 43,004 psi | 90% | 2510 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,737 psi | 75% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,046 psi | 86% | 2388 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,554 psi | 89% | 2392 fps | 97% |
| IMR 4831 | <<locked>> | 90% | 41,829 psi | 87% | 2444 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 42,148 psi | 88% | 2392 fps | 98.2% |
| Lovex S070 | <<locked>> | 88% | 42,670 psi | 89% | 2421 fps | 97.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,782 psi | 77% | 2356 fps | 96.8% |
| Norma MRP | <<locked>> | 96% | 41,031 psi | 86% | 2526 fps | 96.8% |
| Norma URP | <<locked>> | 88% | 40,828 psi | 85% | 2441 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 42,293 psi | 88% | 2480 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,564 psi | 76% | 1598 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,496 psi | 89% | 2520 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 40,582 psi | 85% | 2464 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,830 psi | 89% | 2530 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 43,120 psi | 90% | 2428 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 40,930 psi | 86% | 2359 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,148 psi | 88% | 2392 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 88% | 42,670 psi | 89% | 2421 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,553 psi | 87% | 2431 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,786 psi | 89% | 2306 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,597 psi | 87% | 2343 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 43,279 psi | 90% | 2497 fps | 95.9% |
| Somchem S355 | <<locked>> | 82% | 41,017 psi | 86% | 2382 fps | 99.8% |
| Somchem S365 | <<locked>> | 92% | 41,597 psi | 87% | 2490 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 41,379 psi | 86% | 2434 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 84% | 41,771 psi | 87% | 2365 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,699 psi | 89% | 2438 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 41,945 psi | 88% | 2441 fps | 99% |
| Vihtavuori N555 | <<locked>> | 96% | 40,828 psi | 85% | 2490 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,235 psi | 88% | 2415 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,698 psi | 85% | 2441 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,637 psi | 79% | 2549 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 33,808 psi | 71% | 2293 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 31,067 psi | 65% | 2241 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,538 psi | 85% | 2356 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,451 psi | 85% | 2375 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,372 psi | 66% | 2254 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,940 psi | 73% | 2369 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,802 psi | 54% | 2136 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,866 psi | 69% | 2333 fps | 95.6% |
| Alliant Reloder-26 | 45.3 gr | 88% | 30,995 psi | 65% | 2336 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 40,393 psi | 84% | 2388 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 38,566 psi | 81% | 2313 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 82% | 35,578 psi | 74% | 2336 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,935 psi | 60% | 2165 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 84% | 37,246 psi | 78% | 2395 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 56% | 1388 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 38,711 psi | 81% | 2343 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,623 psi | 79% | 2297 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 30,313 psi | 63% | 2208 fps | 96.4% |
| Lovex S065 | <<locked>> | 80% | 35,114 psi | 73% | 2251 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 35,534 psi | 74% | 2280 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 32,401 psi | 68% | 2264 fps | 95.2% |
| Norma MRP | 46 gr | 92% | 35,969 psi | 75% | 2418 fps | 95% |
| Norma URP | <<locked>> | 80% | 31,444 psi | 66% | 2244 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 82% | 32,764 psi | 68% | 2280 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 57% | 1427 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,159 psi | 78% | 2421 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,893 psi | 65% | 2260 fps | 96.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 30,705 psi | 64% | 2257 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 37,898 psi | 79% | 2333 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 38,566 psi | 81% | 2313 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,114 psi | 73% | 2251 fps | 96.4% |
| Shooters World SW4350 | <<locked>> | 82% | 35,534 psi | 74% | 2280 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,856 psi | 81% | 2382 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,219 psi | 84% | 2267 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,608 psi | 76% | 2247 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 40,437 psi | 84% | 2444 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 38,609 psi | 81% | 2336 fps | 99.6% |
| Somchem S365 | 38.1 gr | 80% | 28,210 psi | 59% | 2205 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 38,972 psi | 81% | 2388 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 36,709 psi | 77% | 2277 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,721 psi | 68% | 2244 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 32,372 psi | 68% | 2247 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 25,860 psi | 54% | 2149 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,503 psi | 68% | 2224 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 35,824 psi | 75% | 2343 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,192 psi | 51% | 2149 fps | 95.2% |
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 46 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 173gr | RWS H-Mantel. Alliant Reloder-26 delivers the highest muzzle velocity at 2,569 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,569 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 173.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Hodgdon TrailBoss 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. Alliant Reloder-26, Norma MRP, Somchem S365 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 173gr | RWS H-Mantel 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.