Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 174gr | Prvi Partizan PSP BT bullet and 44 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 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% | 41,713 psi | 87% | 2441 fps | 98.1% |
| Accurate 4350 | <<locked>> | 88% | 41,263 psi | 86% | 2444 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 43,221 psi | 90% | 2395 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,018 psi | 90% | 2500 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,931 psi | 90% | 2520 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,293 psi | 88% | 2513 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,275 psi | 78% | 2431 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,278 psi | 86% | 2566 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 43,178 psi | 90% | 2428 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 41,118 psi | 86% | 2359 fps | 96.2% |
| Hodgdon H414 | <<locked>> | 86% | 40,915 psi | 85% | 2438 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,395 psi | 89% | 2438 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 43,221 psi | 90% | 2510 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,752 psi | 75% | 1552 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,234 psi | 86% | 2385 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,743 psi | 89% | 2388 fps | 97.1% |
| IMR 4831 | <<locked>> | 90% | 42,061 psi | 88% | 2441 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 42,337 psi | 88% | 2388 fps | 98.3% |
| Lovex S070 | <<locked>> | 88% | 42,873 psi | 90% | 2418 fps | 97.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,014 psi | 77% | 2356 fps | 96.9% |
| Norma MRP | <<locked>> | 96% | 41,263 psi | 86% | 2526 fps | 96.9% |
| Norma URP | <<locked>> | 88% | 41,046 psi | 86% | 2438 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 42,511 psi | 89% | 2477 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 76% | 1591 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,714 psi | 89% | 2516 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 40,828 psi | 85% | 2461 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,047 psi | 90% | 2526 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 82% | 40,785 psi | 85% | 2382 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 41,118 psi | 86% | 2359 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,337 psi | 88% | 2388 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 88% | 42,873 psi | 90% | 2418 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,771 psi | 87% | 2428 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,960 psi | 90% | 2303 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,800 psi | 87% | 2339 fps | 97% |
| Somchem S355 | <<locked>> | 82% | 41,220 psi | 86% | 2379 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 41,829 psi | 87% | 2487 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 41,597 psi | 87% | 2431 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 84% | 41,974 psi | 88% | 2362 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,931 psi | 90% | 2434 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 42,163 psi | 88% | 2441 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 96% | 41,089 psi | 86% | 2487 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,438 psi | 89% | 2411 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,915 psi | 85% | 2438 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,855 psi | 79% | 2546 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% | 31,705 psi | 66% | 2241 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 31,241 psi | 65% | 2241 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,712 psi | 85% | 2352 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,517 psi | 66% | 2251 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,128 psi | 73% | 2365 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,294 psi | 51% | 2080 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,025 psi | 69% | 2329 fps | 95.8% |
| Alliant Reloder-26 | 44.3 gr | 86% | 29,211 psi | 61% | 2280 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 40,611 psi | 85% | 2382 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 38,740 psi | 81% | 2313 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 82% | 35,766 psi | 75% | 2333 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,080 psi | 61% | 2162 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 84% | 37,434 psi | 78% | 2392 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 56% | 1385 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 38,899 psi | 81% | 2339 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,782 psi | 79% | 2293 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 30,487 psi | 64% | 2205 fps | 96.6% |
| Lovex S065 | <<locked>> | 80% | 35,273 psi | 74% | 2251 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 35,708 psi | 75% | 2277 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 32,605 psi | 68% | 2260 fps | 95.4% |
| Norma MRP | 46 gr | 92% | 36,158 psi | 76% | 2418 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 31,604 psi | 66% | 2241 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 82% | 32,938 psi | 69% | 2277 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 57% | 1421 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,347 psi | 78% | 2418 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,067 psi | 65% | 2257 fps | 96.3% |
| ReloadSwiss RS 70 | 40.8 gr | 80% | 30,850 psi | 64% | 2254 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 38,101 psi | 80% | 2333 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 38,740 psi | 81% | 2313 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,273 psi | 74% | 2251 fps | 96.6% |
| Shooters World SW4350 | <<locked>> | 82% | 35,708 psi | 75% | 2277 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,059 psi | 82% | 2382 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,379 psi | 84% | 2264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,767 psi | 77% | 2244 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 38,798 psi | 81% | 2333 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 28,355 psi | 59% | 2201 fps | 98.8% |
| Somchem S385 | <<locked>> | 92% | 39,189 psi | 82% | 2385 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 36,883 psi | 77% | 2274 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,895 psi | 69% | 2241 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 80% | 32,547 psi | 68% | 2247 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 26,005 psi | 54% | 2149 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,648 psi | 68% | 2221 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 35,998 psi | 75% | 2339 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,323 psi | 51% | 2152 fps | 95.4% |
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 44 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 174gr | Prvi Partizan PSP BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,566 fps; across all powders the maximum-charge window runs from 1,552 fps to 2,566 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 44 of the 44 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 1:11.0 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, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 174gr | Prvi Partizan PSP BT 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.