Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .285 | 173gr | Prvi Partizan SP bullet and 47 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 40,640 psi | 85% | 2441 fps | 98% |
| Accurate 4350 | <<locked>> | 88% | 42,873 psi | 90% | 2490 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,901 psi | 88% | 2500 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 41,800 psi | 87% | 2520 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 98% | 41,205 psi | 86% | 2516 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,566 psi | 81% | 2484 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 43,018 psi | 90% | 2621 fps | 99.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 42,714 psi | 89% | 2539 fps | 95.9% |
| Bofors RP7 | <<locked>> | 84% | 42,264 psi | 88% | 2402 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 86% | 42,337 psi | 88% | 2484 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 84% | 43,149 psi | 90% | 2454 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 41,336 psi | 86% | 2438 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,785 psi | 87% | 2503 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 75% | 1578 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,786 psi | 89% | 2434 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,220 psi | 86% | 2382 fps | 96.9% |
| IMR 4831 | <<locked>> | 88% | 41,002 psi | 86% | 2444 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 41,118 psi | 86% | 2385 fps | 98.2% |
| Lovex S070 | <<locked>> | 86% | 41,568 psi | 87% | 2415 fps | 97.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,769 psi | 81% | 2405 fps | 97.6% |
| Norma MRP | <<locked>> | 96% | 43,047 psi | 90% | 2582 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 42,511 psi | 89% | 2484 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 41,292 psi | 86% | 2477 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 77% | 1614 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 41,423 psi | 87% | 2513 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 42,540 psi | 89% | 2513 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,930 psi | 88% | 2530 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 82% | 42,177 psi | 88% | 2425 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 42,554 psi | 89% | 2497 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 84% | 42,264 psi | 88% | 2402 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 41,118 psi | 86% | 2385 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 86% | 41,568 psi | 87% | 2415 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 43,308 psi | 90% | 2474 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,091 psi | 90% | 2385 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,148 psi | 88% | 2490 fps | 95.9% |
| Somchem S355 | <<locked>> | 82% | 42,598 psi | 89% | 2421 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 41,060 psi | 86% | 2493 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 40,625 psi | 85% | 2434 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 82% | 40,785 psi | 85% | 2362 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 41,582 psi | 87% | 2431 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 98% | 42,569 psi | 89% | 2457 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 86% | 40,843 psi | 85% | 2434 fps | 99% |
| Vihtavuori N555 | <<locked>> | 96% | 43,076 psi | 90% | 2539 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 41,104 psi | 86% | 2408 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,598 psi | 89% | 2490 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,363 psi | 82% | 2602 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,105 psi | 90% | 2470 fps | 95.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 30,995 psi | 65% | 2241 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 32,576 psi | 68% | 2287 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,648 psi | 68% | 2300 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,477 psi | 76% | 2415 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,164 psi | 53% | 2126 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,039 psi | 67% | 2326 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,327 psi | 63% | 2333 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 40,321 psi | 84% | 2493 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 37,449 psi | 78% | 2306 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 34,853 psi | 73% | 2333 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 40,509 psi | 85% | 2405 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,023 psi | 63% | 2205 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 82% | 36,347 psi | 76% | 2392 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 56% | 1404 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 37,739 psi | 79% | 2339 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,740 psi | 81% | 2333 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 31,720 psi | 66% | 2251 fps | 97.2% |
| Lovex S065 | <<locked>> | 80% | 36,477 psi | 76% | 2293 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 34,606 psi | 72% | 2274 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 32,082 psi | 67% | 2267 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 35,302 psi | 74% | 2418 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 32,866 psi | 69% | 2290 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 31,850 psi | 67% | 2270 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,383 psi | 57% | 1440 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,798 psi | 81% | 2467 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,213 psi | 67% | 2303 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 31,952 psi | 67% | 2306 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 39,479 psi | 82% | 2375 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 40,074 psi | 84% | 2451 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 37,449 psi | 78% | 2306 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,477 psi | 76% | 2293 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 80% | 34,606 psi | 72% | 2274 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,364 psi | 84% | 2421 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,520 psi | 74% | 2238 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 39,711 psi | 83% | 2444 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 40,161 psi | 84% | 2379 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 29,457 psi | 62% | 2247 fps | 99.2% |
| Somchem S385 | <<locked>> | 90% | 38,087 psi | 80% | 2385 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 38,189 psi | 80% | 2316 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,113 psi | 71% | 2283 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 96% | 39,914 psi | 83% | 2408 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 33,707 psi | 70% | 2290 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 80% | 25,367 psi | 53% | 2146 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,707 psi | 70% | 2264 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 34,853 psi | 73% | 2333 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 23,670 psi | 49% | 2146 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 94% | 40,335 psi | 84% | 2418 fps | 95% |
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 SP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,621 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 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.