Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 175gr | Woodleigh PP SN 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 42,250 psi | 88% | 2444 fps | 98.3% |
| Accurate 4350 | <<locked>> | 88% | 41,887 psi | 88% | 2451 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,017 psi | 86% | 2457 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 84% | 40,625 psi | 85% | 2474 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 42,960 psi | 90% | 2474 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,511 psi | 89% | 2513 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,728 psi | 89% | 2516 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,652 psi | 79% | 2438 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,713 psi | 87% | 2569 fps | 99.4% |
| Bofors RP5 | <<locked>> | 98% | 42,511 psi | 89% | 2513 fps | 95.9% |
| Bofors RP7 | <<locked>> | 84% | 41,582 psi | 87% | 2362 fps | 96.5% |
| Hodgdon H414 | <<locked>> | 86% | 41,437 psi | 87% | 2444 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 84% | 42,221 psi | 88% | 2411 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,250 psi | 90% | 2444 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,669 psi | 85% | 2457 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 75% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,698 psi | 87% | 2392 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,221 psi | 90% | 2395 fps | 97.3% |
| IMR 4831 | <<locked>> | 90% | 42,873 psi | 90% | 2451 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 42,844 psi | 90% | 2392 fps | 98.5% |
| Lovex S070 | <<locked>> | 86% | 40,930 psi | 86% | 2379 fps | 97.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,463 psi | 78% | 2359 fps | 97.2% |
| Norma MRP | <<locked>> | 96% | 41,959 psi | 88% | 2536 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 41,568 psi | 87% | 2441 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 43,236 psi | 90% | 2487 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,579 psi | 76% | 1591 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,279 psi | 90% | 2523 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,394 psi | 86% | 2467 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 40,727 psi | 85% | 2480 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 82% | 41,336 psi | 86% | 2385 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 41,582 psi | 87% | 2362 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,844 psi | 90% | 2392 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 86% | 40,930 psi | 86% | 2379 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,293 psi | 88% | 2434 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,221 psi | 90% | 2303 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,235 psi | 88% | 2343 fps | 97.2% |
| Somchem S355 | <<locked>> | 82% | 41,727 psi | 87% | 2382 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 42,728 psi | 89% | 2497 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,366 psi | 89% | 2441 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 84% | 42,482 psi | 89% | 2365 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 40,625 psi | 85% | 2392 fps | 99% |
| Vihtavuori N165 | <<locked>> | 98% | 41,524 psi | 87% | 2411 fps | 96% |
| Vihtavuori N550 | <<locked>> | 88% | 42,670 psi | 89% | 2444 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 96% | 41,684 psi | 87% | 2493 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,873 psi | 90% | 2415 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,437 psi | 87% | 2444 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,247 psi | 80% | 2552 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% | 32,198 psi | 67% | 2251 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 31,763 psi | 66% | 2247 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,923 psi | 67% | 2260 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,592 psi | 74% | 2372 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 40,277 psi | 84% | 2421 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 39,827 psi | 83% | 2461 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,627 psi | 51% | 2090 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 31,328 psi | 65% | 2283 fps | 95.1% |
| Alliant Reloder-26 | 44.6 gr | 86% | 29,602 psi | 62% | 2290 fps | 95.5% |
| Bofors RP5 | <<locked>> | 96% | 39,827 psi | 83% | 2461 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 36,709 psi | 77% | 2267 fps | 95% |
| Hodgdon H414 | <<locked>> | 82% | 36,245 psi | 76% | 2339 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 39,552 psi | 83% | 2359 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,486 psi | 62% | 2169 fps | 98% |
| Hodgdon Superformance | <<locked>> | 84% | 38,116 psi | 80% | 2405 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,789 psi | 56% | 1385 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 36,898 psi | 77% | 2297 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,247 psi | 80% | 2300 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 30,951 psi | 65% | 2211 fps | 96.9% |
| Lovex S065 | <<locked>> | 80% | 35,723 psi | 75% | 2254 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 33,866 psi | 71% | 2234 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 33,069 psi | 69% | 2267 fps | 95.7% |
| Norma MRP | 46.3 gr | 92% | 36,593 psi | 76% | 2425 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 32,082 psi | 67% | 2247 fps | 97% |
| Ramshot Hunter | <<locked>> | 82% | 33,359 psi | 70% | 2283 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,340 psi | 57% | 1421 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,840 psi | 79% | 2421 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,531 psi | 66% | 2264 fps | 96.6% |
| ReloadSwiss RS 70 | 41.1 gr | 80% | 31,227 psi | 65% | 2264 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 38,624 psi | 81% | 2336 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 80% | 36,709 psi | 77% | 2267 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,723 psi | 75% | 2254 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 80% | 33,866 psi | 71% | 2234 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,595 psi | 83% | 2385 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,640 psi | 85% | 2264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 34,809 psi | 73% | 2201 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 39,334 psi | 82% | 2339 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 28,776 psi | 60% | 2208 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 37,086 psi | 77% | 2339 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 37,376 psi | 78% | 2277 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 33,373 psi | 70% | 2247 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 38,841 psi | 81% | 2362 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 33,011 psi | 69% | 2254 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 26,455 psi | 55% | 2156 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,025 psi | 69% | 2228 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 36,492 psi | 76% | 2346 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,642 psi | 51% | 2162 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 | 175gr | Woodleigh PP SN. 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 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 175.0 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 | 175gr | Woodleigh PP SN 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.