Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .285 | 173gr | Prvi Partizan FMJ BT bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Norma MRP.
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% | 42,859 psi | 90% | 2474 fps | 98.4% |
| Accurate 4350 | <<locked>> | 88% | 42,105 psi | 88% | 2474 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,220 psi | 86% | 2484 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 84% | 41,104 psi | 86% | 2503 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,308 psi | 90% | 2500 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,062 psi | 90% | 2543 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 40,582 psi | 85% | 2497 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,116 psi | 80% | 2467 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 42,177 psi | 88% | 2598 fps | 99.4% |
| Bofors RP5 | <<locked>> | 98% | 43,062 psi | 90% | 2543 fps | 96.1% |
| Bofors RP7 | <<locked>> | 84% | 41,843 psi | 87% | 2388 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 86% | 41,930 psi | 88% | 2474 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 84% | 42,453 psi | 89% | 2434 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 40,901 psi | 85% | 2425 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 41,176 psi | 86% | 2487 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 75% | 1572 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,163 psi | 88% | 2418 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,828 psi | 85% | 2369 fps | 96.7% |
| IMR 4831 | <<locked>> | 90% | 43,076 psi | 90% | 2474 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 43,062 psi | 90% | 2415 fps | 98.5% |
| Lovex S070 | <<locked>> | 86% | 41,147 psi | 86% | 2402 fps | 97.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,130 psi | 80% | 2388 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 42,221 psi | 88% | 2562 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 42,061 psi | 88% | 2470 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 40,930 psi | 86% | 2464 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 77% | 1608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 40,988 psi | 86% | 2503 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,814 psi | 87% | 2493 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,350 psi | 86% | 2513 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 82% | 41,655 psi | 87% | 2411 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 41,901 psi | 88% | 2480 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 41,843 psi | 87% | 2388 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,062 psi | 90% | 2415 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 86% | 41,147 psi | 86% | 2402 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,554 psi | 89% | 2457 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,714 psi | 89% | 2372 fps | 97.3% |
| Somchem S355 | <<locked>> | 82% | 42,076 psi | 88% | 2408 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 43,178 psi | 90% | 2523 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,743 psi | 89% | 2467 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 84% | 42,743 psi | 89% | 2392 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 41,133 psi | 86% | 2421 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 98% | 42,032 psi | 88% | 2441 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 88% | 43,105 psi | 90% | 2470 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 96% | 42,351 psi | 88% | 2523 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,163 psi | 90% | 2441 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,930 psi | 88% | 2474 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,653 psi | 81% | 2582 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% | 32,561 psi | 68% | 2274 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 32,097 psi | 67% | 2274 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,227 psi | 67% | 2287 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,810 psi | 75% | 2395 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 40,625 psi | 85% | 2448 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 40,350 psi | 84% | 2490 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,845 psi | 52% | 2113 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 31,589 psi | 66% | 2310 fps | 95.2% |
| Alliant Reloder-26 | 45.4 gr | 86% | 29,878 psi | 62% | 2313 fps | 95.6% |
| Bofors RP5 | <<locked>> | 96% | 40,350 psi | 84% | 2490 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 37,028 psi | 77% | 2293 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 82% | 36,492 psi | 76% | 2365 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 39,813 psi | 83% | 2385 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,602 psi | 62% | 2192 fps | 98% |
| Hodgdon Superformance | <<locked>> | 84% | 38,406 psi | 80% | 2431 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 56% | 1398 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 37,347 psi | 78% | 2326 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,276 psi | 80% | 2320 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 31,256 psi | 65% | 2238 fps | 96.9% |
| Lovex S065 | <<locked>> | 80% | 36,042 psi | 75% | 2280 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 34,185 psi | 71% | 2260 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 31,459 psi | 66% | 2251 fps | 95% |
| Norma MRP | 47.2 gr | 92% | 37,072 psi | 77% | 2454 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,372 psi | 68% | 2274 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 82% | 33,576 psi | 70% | 2310 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 57% | 1434 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,101 psi | 80% | 2448 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,792 psi | 66% | 2290 fps | 96.7% |
| ReloadSwiss RS 70 | 41.9 gr | 80% | 31,618 psi | 66% | 2290 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,986 psi | 81% | 2362 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 39,479 psi | 82% | 2431 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 37,028 psi | 77% | 2293 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,042 psi | 75% | 2280 fps | 96.9% |
| Shooters World SW4350 | <<locked>> | 80% | 34,185 psi | 71% | 2260 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,885 psi | 83% | 2411 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,099 psi | 73% | 2224 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 39,668 psi | 83% | 2365 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 29,037 psi | 61% | 2234 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 37,478 psi | 78% | 2365 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 37,724 psi | 79% | 2303 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 33,678 psi | 70% | 2270 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 39,392 psi | 82% | 2392 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 33,272 psi | 70% | 2277 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 26,731 psi | 56% | 2182 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,185 psi | 69% | 2251 fps | 99.1% |
| Winchester 760 | <<locked>> | 80% | 34,418 psi | 72% | 2320 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,714 psi | 52% | 2182 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 .285 | 173gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,598 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,598 fps. Alliant Reloder-25 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 173.0 gr projectile in 0.285" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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, ReloadSwiss RS 70, Norma MRP rank at the top here: for 7 mm Mag. Fl. H&H with the .285 | 173gr | Prvi Partizan FMJ 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.