Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 174gr | Prvi Partizan SP bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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% | 42,453 psi | 89% | 2457 fps | 98.3% |
| Accurate 4350 | <<locked>> | 88% | 42,148 psi | 88% | 2464 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,017 psi | 86% | 2467 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 84% | 40,886 psi | 85% | 2487 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,134 psi | 90% | 2487 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,670 psi | 89% | 2526 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,917 psi | 90% | 2530 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,782 psi | 79% | 2451 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 42,105 psi | 88% | 2589 fps | 99.4% |
| Bofors RP5 | <<locked>> | 98% | 42,670 psi | 89% | 2526 fps | 95.9% |
| Bofors RP7 | <<locked>> | 84% | 41,887 psi | 88% | 2379 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 86% | 41,698 psi | 87% | 2457 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 84% | 42,511 psi | 89% | 2425 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,207 psi | 90% | 2454 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,814 psi | 85% | 2470 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 75% | 1562 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,945 psi | 88% | 2405 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,221 psi | 90% | 2405 fps | 97.3% |
| IMR 4831 | <<locked>> | 90% | 42,844 psi | 90% | 2461 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 43,091 psi | 90% | 2408 fps | 98.6% |
| Lovex S070 | <<locked>> | 86% | 40,901 psi | 85% | 2388 fps | 97.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,942 psi | 79% | 2375 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 42,105 psi | 88% | 2549 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 41,829 psi | 87% | 2457 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 40,756 psi | 85% | 2451 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 76% | 1598 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 40,727 psi | 85% | 2487 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,626 psi | 87% | 2480 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 40,901 psi | 85% | 2493 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 82% | 41,379 psi | 86% | 2395 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 94% | 41,727 psi | 87% | 2467 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 84% | 41,887 psi | 88% | 2379 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,091 psi | 90% | 2408 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 86% | 40,901 psi | 85% | 2388 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,293 psi | 88% | 2444 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,511 psi | 89% | 2359 fps | 97.3% |
| Somchem S355 | <<locked>> | 82% | 42,061 psi | 88% | 2398 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 42,960 psi | 90% | 2510 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,569 psi | 89% | 2454 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 84% | 42,801 psi | 89% | 2382 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 40,901 psi | 85% | 2405 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 98% | 41,640 psi | 87% | 2425 fps | 96% |
| Vihtavuori N550 | <<locked>> | 88% | 42,902 psi | 90% | 2457 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 96% | 41,916 psi | 88% | 2503 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,033 psi | 90% | 2428 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,698 psi | 87% | 2457 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,609 psi | 81% | 2569 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>> | 90% | 32,387 psi | 68% | 2260 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 32,053 psi | 67% | 2264 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,981 psi | 67% | 2270 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,853 psi | 75% | 2388 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 40,480 psi | 85% | 2434 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 40,248 psi | 84% | 2477 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,816 psi | 52% | 2103 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 31,473 psi | 66% | 2297 fps | 95.2% |
| Alliant Reloder-26 | 45 gr | 86% | 29,718 psi | 62% | 2300 fps | 95.5% |
| Bofors RP5 | <<locked>> | 96% | 40,248 psi | 84% | 2477 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 36,767 psi | 77% | 2277 fps | 95% |
| Hodgdon H414 | <<locked>> | 82% | 36,492 psi | 76% | 2356 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 39,842 psi | 83% | 2375 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,559 psi | 62% | 2182 fps | 98% |
| Hodgdon Superformance | <<locked>> | 84% | 38,276 psi | 80% | 2418 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 56% | 1391 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 37,130 psi | 78% | 2310 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,305 psi | 80% | 2310 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 31,009 psi | 65% | 2221 fps | 96.9% |
| Lovex S065 | <<locked>> | 80% | 35,766 psi | 75% | 2264 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 33,924 psi | 71% | 2244 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 31,285 psi | 65% | 2238 fps | 95% |
| Norma MRP | 46.8 gr | 92% | 36,956 psi | 77% | 2441 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 32,155 psi | 67% | 2260 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 82% | 33,388 psi | 70% | 2293 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 57% | 1427 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,145 psi | 80% | 2438 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,575 psi | 66% | 2274 fps | 96.7% |
| ReloadSwiss RS 70 | 41.5 gr | 80% | 31,459 psi | 66% | 2277 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 38,667 psi | 81% | 2349 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 39,305 psi | 82% | 2418 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 36,767 psi | 77% | 2277 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,766 psi | 75% | 2264 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 80% | 33,924 psi | 71% | 2244 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,624 psi | 83% | 2395 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 34,824 psi | 73% | 2211 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 39,407 psi | 82% | 2349 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 28,819 psi | 60% | 2221 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 37,304 psi | 78% | 2356 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 37,434 psi | 78% | 2287 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 33,663 psi | 70% | 2264 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 39,262 psi | 82% | 2379 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 33,025 psi | 69% | 2264 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 26,658 psi | 56% | 2172 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,025 psi | 69% | 2238 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 36,492 psi | 76% | 2356 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,627 psi | 51% | 2172 fps | 96% |
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 47 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 174gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,589 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,589 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 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 174.0 gr projectile in 0.284" calls for a 1:11.5 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. Norma MRP, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 174gr | Prvi Partizan SP 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.