Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 171gr | Barnes Match Burner 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 ReloadSwiss RS 62.
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 3100ᴾ | <<locked>> | 100% | 42,525 psi | 89% | 2467 fps | 97.9% |
| Accurate 4350 | <<locked>> | 90% | 42,206 psi | 88% | 2477 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 41,989 psi | 88% | 2388 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,785 psi | 87% | 2408 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,524 psi | 87% | 2484 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 41,408 psi | 87% | 2507 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,596 psi | 85% | 2497 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,940 psi | 75% | 2411 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,192 psi | 88% | 2595 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 41,785 psi | 87% | 2418 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 42,438 psi | 89% | 2392 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 82% | 42,511 psi | 89% | 2425 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 88% | 42,163 psi | 88% | 2474 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 41,118 psi | 86% | 2431 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 41,597 psi | 87% | 2490 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 74% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 42,554 psi | 89% | 2421 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,321 psi | 86% | 2375 fps | 96.4% |
| IMR 4831 | <<locked>> | 90% | 40,741 psi | 85% | 2434 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 41,147 psi | 86% | 2379 fps | 97.8% |
| Lovex S070 | <<locked>> | 88% | 41,423 psi | 87% | 2405 fps | 96.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,505 psi | 74% | 2336 fps | 96.1% |
| Norma MRP | <<locked>> | 98% | 42,409 psi | 89% | 2559 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 42,279 psi | 88% | 2474 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 41,046 psi | 86% | 2464 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,405 psi | 76% | 1598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,786 psi | 89% | 2408 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 41,205 psi | 86% | 2507 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,076 psi | 88% | 2500 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,684 psi | 87% | 2513 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 84% | 41,959 psi | 88% | 2415 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 42,438 psi | 89% | 2392 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,147 psi | 86% | 2379 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 88% | 41,423 psi | 87% | 2405 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,004 psi | 90% | 2467 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,669 psi | 87% | 2300 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,178 psi | 90% | 2375 fps | 97% |
| Somchem S355 | <<locked>> | 84% | 42,395 psi | 89% | 2415 fps | 99.9% |
| Somchem S365 | <<locked>> | 94% | 43,134 psi | 90% | 2526 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 42,670 psi | 89% | 2464 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 86% | 43,250 psi | 90% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 41,365 psi | 86% | 2421 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 90% | 43,178 psi | 90% | 2470 fps | 99% |
| Vihtavuori N555 | <<locked>> | 98% | 41,974 psi | 88% | 2520 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 40,886 psi | 85% | 2398 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 42,163 psi | 88% | 2474 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,448 psi | 76% | 2523 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% | 32,561 psi | 68% | 2274 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 29,994 psi | 63% | 2224 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 39,508 psi | 83% | 2339 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,320 psi | 82% | 2362 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,487 psi | 64% | 2234 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,040 psi | 71% | 2352 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,585 psi | 56% | 2165 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,663 psi | 70% | 2356 fps | 95.5% |
| Alliant Reloder-26 | 44.5 gr | 88% | 30,066 psi | 63% | 2313 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 38,972 psi | 81% | 2369 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 39,958 psi | 83% | 2346 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 39,653 psi | 83% | 2372 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 36,796 psi | 77% | 2369 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,050 psi | 59% | 2149 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 86% | 38,682 psi | 81% | 2428 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 56% | 1391 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 40,103 psi | 84% | 2375 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 36,695 psi | 77% | 2283 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 29,341 psi | 61% | 2192 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 34,142 psi | 71% | 2238 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 36,709 psi | 77% | 2310 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 33,286 psi | 70% | 2290 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 37,101 psi | 78% | 2448 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,487 psi | 64% | 2228 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 84% | 33,895 psi | 71% | 2313 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 56% | 1424 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,045 psi | 84% | 2359 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,216 psi | 76% | 2408 fps | 100% |
| ReloadSwiss RS 62 | 39.4 gr | 80% | 29,791 psi | 62% | 2238 fps | 95.4% |
| ReloadSwiss RS 70 | 41.1 gr | 82% | 31,995 psi | 67% | 2293 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 36,767 psi | 77% | 2320 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 39,958 psi | 83% | 2346 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,142 psi | 71% | 2238 fps | 95.8% |
| Shooters World SW4350 | <<locked>> | 84% | 36,709 psi | 77% | 2310 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,782 psi | 79% | 2369 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,146 psi | 82% | 2257 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,898 psi | 79% | 2280 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 37,507 psi | 78% | 2323 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,311 psi | 57% | 2188 fps | 98.1% |
| Somchem S385 | <<locked>> | 94% | 40,118 psi | 84% | 2415 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 35,679 psi | 75% | 2264 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 31,749 psi | 66% | 2228 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 31,212 psi | 65% | 2228 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 26,614 psi | 56% | 2178 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,546 psi | 66% | 2208 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 37,043 psi | 77% | 2372 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 24,816 psi | 52% | 2175 fps | 95.2% |
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 | 171gr | Barnes Match Burner BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,595 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,595 fps. Accurate 3100 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 74–90 %, leaving at least 10 % headroom. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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, ReloadSwiss RS 62 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 171gr | Barnes Match Burner 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.