Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 173gr | Sellier & Bellot SPCE 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% | 42,206 psi | 88% | 2461 fps | 98.2% |
| Accurate 4350 | <<locked>> | 88% | 41,655 psi | 87% | 2464 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 40,843 psi | 85% | 2470 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 40,698 psi | 85% | 2490 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,714 psi | 89% | 2533 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,623 psi | 79% | 2454 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,640 psi | 87% | 2585 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 41,466 psi | 87% | 2375 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 86% | 41,220 psi | 86% | 2454 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 84% | 42,061 psi | 88% | 2421 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,033 psi | 90% | 2457 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,640 psi | 85% | 2474 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 75% | 1565 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,771 psi | 87% | 2408 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,091 psi | 90% | 2408 fps | 97.2% |
| IMR 4831 | <<locked>> | 90% | 42,656 psi | 89% | 2464 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 42,656 psi | 89% | 2405 fps | 98.4% |
| Lovex S070 | <<locked>> | 86% | 40,756 psi | 85% | 2392 fps | 97.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,492 psi | 78% | 2375 fps | 97.1% |
| Norma MRP | <<locked>> | 96% | 41,916 psi | 88% | 2552 fps | 97.2% |
| Norma URP | <<locked>> | 88% | 41,669 psi | 87% | 2461 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 43,033 psi | 90% | 2500 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 76% | 1601 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 40,538 psi | 85% | 2490 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,408 psi | 87% | 2484 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 40,727 psi | 85% | 2497 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 82% | 41,191 psi | 86% | 2398 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 41,466 psi | 87% | 2375 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,656 psi | 89% | 2405 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 86% | 40,756 psi | 85% | 2392 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,134 psi | 88% | 2448 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,134 psi | 90% | 2320 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,105 psi | 88% | 2356 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 41,640 psi | 87% | 2398 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 42,453 psi | 89% | 2510 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,076 psi | 88% | 2451 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 84% | 42,308 psi | 88% | 2382 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,250 psi | 90% | 2454 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 98% | 41,452 psi | 87% | 2428 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 88% | 42,714 psi | 89% | 2461 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 96% | 41,684 psi | 87% | 2507 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,859 psi | 90% | 2431 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,510 psi | 87% | 2461 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,450 psi | 80% | 2572 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% | 32,184 psi | 67% | 2264 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 31,662 psi | 66% | 2260 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,850 psi | 67% | 2274 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,476 psi | 74% | 2385 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,555 psi | 51% | 2100 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 31,343 psi | 65% | 2297 fps | 95% |
| Alliant Reloder-26 | 45 gr | 86% | 29,602 psi | 62% | 2303 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 39,102 psi | 82% | 2333 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 82% | 36,114 psi | 75% | 2352 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 39,407 psi | 82% | 2372 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,457 psi | 62% | 2185 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 84% | 37,869 psi | 79% | 2415 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 56% | 1394 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 36,970 psi | 77% | 2313 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,159 psi | 80% | 2313 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 30,879 psi | 65% | 2224 fps | 96.7% |
| Lovex S065 | <<locked>> | 80% | 35,621 psi | 74% | 2267 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 36,042 psi | 75% | 2297 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 33,098 psi | 69% | 2283 fps | 95.6% |
| Norma MRP | 46.7 gr | 92% | 36,564 psi | 76% | 2438 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 31,981 psi | 67% | 2260 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 82% | 33,243 psi | 69% | 2297 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 57% | 1434 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,724 psi | 79% | 2438 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,415 psi | 66% | 2277 fps | 96.5% |
| ReloadSwiss RS 70 | 41.5 gr | 80% | 31,328 psi | 65% | 2280 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 38,508 psi | 80% | 2349 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 39,102 psi | 82% | 2333 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,621 psi | 74% | 2267 fps | 96.7% |
| Shooters World SW4350 | <<locked>> | 82% | 36,042 psi | 75% | 2297 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,450 psi | 82% | 2398 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,596 psi | 85% | 2280 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 34,693 psi | 72% | 2215 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 39,247 psi | 82% | 2356 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 28,660 psi | 60% | 2221 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 37,159 psi | 78% | 2356 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 37,304 psi | 78% | 2293 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 33,272 psi | 70% | 2260 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 38,812 psi | 81% | 2379 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 32,880 psi | 69% | 2264 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 26,368 psi | 55% | 2169 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,895 psi | 69% | 2241 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 36,347 psi | 76% | 2359 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,497 psi | 51% | 2172 fps | 95.7% |
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 | 173gr | Sellier & Bellot SPCE. Alliant Reloder-26 delivers the highest muzzle velocity at 2,585 fps; across all powders the maximum-charge window runs from 1,565 fps to 2,585 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 173.0 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. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 173gr | Sellier & Bellot SPCE 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.