Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 175gr | Speer TBBC 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, Norma MRP and Alliant Reloder-16.
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% | 40,901 psi | 85% | 2415 fps | 97.8% |
| Accurate 4350 | <<locked>> | 90% | 43,279 psi | 90% | 2464 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 82% | 42,743 psi | 89% | 2372 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,641 psi | 89% | 2395 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,395 psi | 89% | 2474 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,322 psi | 88% | 2493 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,553 psi | 87% | 2487 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,463 psi | 76% | 2398 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,265 psi | 90% | 2589 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 42,714 psi | 89% | 2405 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 43,250 psi | 90% | 2382 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 88% | 42,830 psi | 89% | 2461 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 41,756 psi | 87% | 2411 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 42,540 psi | 89% | 2480 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 75% | 1539 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 40,654 psi | 85% | 2359 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,105 psi | 88% | 2362 fps | 96.9% |
| IMR 4831 | <<locked>> | 90% | 41,437 psi | 87% | 2418 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 41,655 psi | 87% | 2362 fps | 98.1% |
| Lovex S070 | <<locked>> | 88% | 42,264 psi | 88% | 2392 fps | 97.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,216 psi | 76% | 2326 fps | 96.6% |
| Norma MRP | <<locked>> | 96% | 40,596 psi | 85% | 2497 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 42,946 psi | 90% | 2457 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 90% | 41,959 psi | 88% | 2454 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 76% | 1575 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,076 psi | 88% | 2493 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,830 psi | 89% | 2484 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,598 psi | 89% | 2503 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 42,888 psi | 90% | 2402 fps | 100% |
| Rottweil R 905 | <<locked>> | 96% | 43,120 psi | 90% | 2470 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 86% | 43,250 psi | 90% | 2382 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,655 psi | 87% | 2362 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 88% | 42,264 psi | 88% | 2392 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,075 psi | 86% | 2405 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,163 psi | 88% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,162 psi | 86% | 2313 fps | 96.8% |
| Somchem S355 | <<locked>> | 84% | 43,265 psi | 90% | 2398 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 41,234 psi | 86% | 2464 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 41,089 psi | 86% | 2408 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 84% | 41,524 psi | 87% | 2343 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,279 psi | 88% | 2408 fps | 99.2% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 42,946 psi | 90% | 2425 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 88% | 41,539 psi | 87% | 2415 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 98% | 43,105 psi | 90% | 2507 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 41,727 psi | 87% | 2385 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,120 psi | 90% | 2464 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,072 psi | 77% | 2513 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>> | 92% | 33,214 psi | 69% | 2264 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 30,748 psi | 64% | 2218 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 80% | 40,234 psi | 84% | 2329 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,103 psi | 84% | 2349 fps | 99.9% |
| Alliant Reloder-16 | 36.6 gr | 80% | 31,082 psi | 65% | 2228 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,534 psi | 72% | 2339 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,454 psi | 53% | 2106 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,445 psi | 68% | 2300 fps | 95.4% |
| Alliant Reloder-26 | 44.5 gr | 88% | 30,806 psi | 64% | 2313 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 39,842 psi | 83% | 2356 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 38,087 psi | 80% | 2283 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 82% | 35,143 psi | 73% | 2306 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,660 psi | 60% | 2139 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 84% | 36,985 psi | 77% | 2369 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 56% | 1375 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 38,276 psi | 80% | 2313 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,376 psi | 78% | 2270 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 30,037 psi | 63% | 2182 fps | 96.3% |
| Lovex S065 | <<locked>> | 80% | 34,809 psi | 73% | 2224 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 35,027 psi | 73% | 2251 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 32,024 psi | 67% | 2238 fps | 95.1% |
| Norma MRP | 46.1 gr | 94% | 37,971 psi | 79% | 2441 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 31,183 psi | 65% | 2218 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 84% | 34,606 psi | 72% | 2303 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 57% | 1407 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,724 psi | 77% | 2392 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,487 psi | 64% | 2231 fps | 96% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 30,589 psi | 64% | 2234 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 37,550 psi | 78% | 2310 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 94% | 40,234 psi | 84% | 2418 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 38,087 psi | 80% | 2283 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,809 psi | 73% | 2224 fps | 96.3% |
| Shooters World SW4350 | <<locked>> | 82% | 35,027 psi | 73% | 2251 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,363 psi | 80% | 2352 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,885 psi | 83% | 2241 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,114 psi | 75% | 2218 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 38,290 psi | 80% | 2310 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 27,934 psi | 58% | 2178 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 38,392 psi | 80% | 2356 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 36,405 psi | 76% | 2251 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,460 psi | 68% | 2218 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 40,393 psi | 84% | 2382 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 31,908 psi | 67% | 2218 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 27,282 psi | 57% | 2172 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,155 psi | 67% | 2198 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 35,375 psi | 74% | 2313 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,382 psi | 53% | 2178 fps | 96.2% |
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 | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,589 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,589 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 1:10.5 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, Alliant Reloder-16 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 175gr | Speer TBBC 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.