Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 158gr | Sellier & Bellot HPC 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-17, Alliant Reloder-26 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 3100ᴾ | <<locked>> | 100% | 39,595 psi | 83% | 2510 fps | 96.4% |
| Accurate 4064 | <<locked>> | 82% | 40,988 psi | 86% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,293 psi | 88% | 2579 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 84% | 42,438 psi | 89% | 2493 fps | 98.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,902 psi | 90% | 2628 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,076 psi | 88% | 2516 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,438 psi | 89% | 2526 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,959 psi | 88% | 2589 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 41,655 psi | 87% | 2612 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,232 psi | 80% | 2546 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,540 psi | 89% | 2697 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 41,887 psi | 88% | 2523 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 43,004 psi | 90% | 2533 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 90% | 42,366 psi | 89% | 2575 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,075 psi | 86% | 2526 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 74% | 1621 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,018 psi | 88% | 2477 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 40,567 psi | 85% | 2530 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 41,930 psi | 88% | 2480 fps | 99.8% |
| Lovex S065 | <<locked>> | 88% | 41,365 psi | 86% | 2477 fps | 97.1% |
| Lovex S070 | <<locked>> | 90% | 41,785 psi | 87% | 2503 fps | 96% |
| Norma 203B | <<locked>> | 82% | 41,756 psi | 87% | 2516 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 42,163 psi | 88% | 2572 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 82% | 41,481 psi | 87% | 2536 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 41,234 psi | 86% | 2562 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 75% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,308 psi | 90% | 2513 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,481 psi | 87% | 2615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 41,945 psi | 88% | 2598 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,901 psi | 88% | 2608 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 86% | 42,090 psi | 88% | 2520 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,365 psi | 86% | 2477 fps | 97.1% |
| Shooters World Precision | <<locked>> | 82% | 41,930 psi | 88% | 2480 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 90% | 41,785 psi | 87% | 2503 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,524 psi | 85% | 2523 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 41,974 psi | 88% | 2405 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,946 psi | 90% | 2523 fps | 99.6% |
| Somchem S365 | <<locked>> | 96% | 42,830 psi | 89% | 2625 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 43,250 psi | 90% | 2467 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 40,886 psi | 85% | 2461 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 41,336 psi | 86% | 2520 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 42,337 psi | 88% | 2477 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 40,828 psi | 85% | 2526 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,684 psi | 87% | 2615 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,466 psi | 87% | 2503 fps | 99.6% |
| Winchester 760 | <<locked>> | 90% | 42,366 psi | 89% | 2575 fps | 96.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,997 psi | 71% | 2546 fps | 99.1% |
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>> | 98% | 36,869 psi | 77% | 2457 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 38,537 psi | 81% | 2431 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,111 psi | 67% | 2369 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 37,623 psi | 79% | 2398 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,132 psi | 84% | 2572 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,217 psi | 78% | 2421 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,929 psi | 83% | 2480 fps | 98.6% |
| Alliant Reloder-16 | 37.9 gr | 82% | 30,734 psi | 64% | 2326 fps | 95% |
| Alliant Reloder-17 | 39.9 gr | 80% | 32,126 psi | 67% | 2395 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,166 psi | 59% | 2290 fps | 95.6% |
| Alliant Reloder-26 | 48 gr | 94% | 34,461 psi | 72% | 2513 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 36,753 psi | 77% | 2425 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 80% | 37,565 psi | 78% | 2425 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 39,595 psi | 83% | 2520 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,527 psi | 55% | 2188 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,411 psi | 55% | 1447 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,508 psi | 83% | 2431 fps | 98.6% |
| IMR 4831 | <<locked>> | 84% | 31,169 psi | 65% | 2326 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 39,465 psi | 82% | 2434 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 36,521 psi | 76% | 2379 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 39,131 psi | 82% | 2454 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 39,291 psi | 82% | 2470 fps | 98.9% |
| Norma URP | <<locked>> | 84% | 32,721 psi | 68% | 2372 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 38,827 psi | 81% | 2484 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 36,434 psi | 76% | 2461 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,890 psi | 56% | 1486 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,971 psi | 79% | 2408 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,171 psi | 71% | 2457 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,937 psi | 67% | 2382 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,432 psi | 72% | 2441 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 34,650 psi | 72% | 2372 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,521 psi | 76% | 2379 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 39,465 psi | 82% | 2434 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 39,131 psi | 82% | 2454 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,418 psi | 74% | 2418 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,072 psi | 77% | 2320 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,563 psi | 74% | 2379 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 25,759 psi | 54% | 2224 fps | 96.4% |
| Vihtavuori N135 | <<locked>> | 80% | 40,596 psi | 85% | 2425 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,750 psi | 71% | 2320 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 31,879 psi | 67% | 2320 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 39,639 psi | 83% | 2428 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,401 psi | 66% | 2323 fps | 95% |
| Vihtavuori N555 | <<locked>> | 90% | 30,066 psi | 63% | 2362 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,907 psi | 62% | 2251 fps | 96.8% |
| Winchester 760 | <<locked>> | 88% | 39,595 psi | 83% | 2520 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,210 psi | 59% | 2365 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 | 158gr | Sellier & Bellot HPC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,697 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 71–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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-17, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 158gr | Sellier & Bellot HPC 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.