Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 156gr | Lapua Naturalis bullet and 38 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 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 3100ᴾ | <<locked>> | 100% | 41,510 psi | 87% | 2556 fps | 96.6% |
| Accurate 4064 | <<locked>> | 82% | 43,047 psi | 90% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 41,263 psi | 86% | 2569 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 41,118 psi | 86% | 2480 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 40,944 psi | 86% | 2507 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 43,047 psi | 90% | 2625 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,134 psi | 90% | 2651 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,508 psi | 83% | 2582 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,031 psi | 86% | 2677 fps | 97.9% |
| Bofors RP3 | <<locked>> | 82% | 40,988 psi | 86% | 2516 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 82% | 41,611 psi | 87% | 2516 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,293 psi | 88% | 2562 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 75% | 1640 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 43,207 psi | 90% | 2510 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 41,930 psi | 88% | 2566 fps | 98.4% |
| Lovex S065 | <<locked>> | 88% | 42,743 psi | 89% | 2513 fps | 97.2% |
| Lovex S070 | <<locked>> | 90% | 43,178 psi | 90% | 2543 fps | 96.1% |
| Norma URP | <<locked>> | 90% | 40,930 psi | 86% | 2562 fps | 98% |
| Ramshot Big Game | <<locked>> | 82% | 42,728 psi | 89% | 2569 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 42,641 psi | 89% | 2602 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 76% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,829 psi | 87% | 2497 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,946 psi | 90% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 43,236 psi | 90% | 2635 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,294 psi | 90% | 2651 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 84% | 41,147 psi | 86% | 2513 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,743 psi | 89% | 2513 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 90% | 43,178 psi | 90% | 2543 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,713 psi | 87% | 2559 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,178 psi | 90% | 2438 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 41,626 psi | 87% | 2513 fps | 99.4% |
| Somchem S365 | <<locked>> | 94% | 41,626 psi | 87% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 42,235 psi | 88% | 2493 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 42,815 psi | 89% | 2559 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 90% | 42,119 psi | 88% | 2562 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,120 psi | 90% | 2654 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,511 psi | 89% | 2536 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,520 psi | 74% | 2592 fps | 99.2% |
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>> | 96% | 36,187 psi | 76% | 2451 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 40,611 psi | 85% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,792 psi | 66% | 2365 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,783 psi | 81% | 2434 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,624 psi | 81% | 2461 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,937 psi | 67% | 2369 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,373 psi | 70% | 2438 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,934 psi | 58% | 2287 fps | 95.1% |
| Alliant Reloder-26 | 47.2 gr | 92% | 33,678 psi | 70% | 2500 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 38,392 psi | 80% | 2467 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 38,972 psi | 81% | 2464 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,891 psi | 58% | 2231 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 56% | 1467 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,741 psi | 85% | 2464 fps | 98.6% |
| IMR 4831 | <<locked>> | 82% | 30,806 psi | 64% | 2326 fps | 95% |
| Lovex S065 | <<locked>> | 82% | 35,853 psi | 75% | 2372 fps | 95.1% |
| Lovex S070 | <<locked>> | 88% | 40,770 psi | 85% | 2497 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 31,937 psi | 67% | 2359 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,016 psi | 84% | 2520 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 37,666 psi | 79% | 2497 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 57% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,262 psi | 82% | 2444 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,447 psi | 74% | 2497 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,359 psi | 70% | 2425 fps | 95.5% |
| ReloadSwiss RS 70 | 43.7 gr | 86% | 35,636 psi | 74% | 2477 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 36,318 psi | 76% | 2415 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,853 psi | 75% | 2372 fps | 95.1% |
| Shooters World SW4350 | <<locked>> | 88% | 40,770 psi | 85% | 2497 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,651 psi | 77% | 2454 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,334 psi | 80% | 2352 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 37,043 psi | 77% | 2421 fps | 98.6% |
| Somchem S365 | 38 gr | 80% | 27,151 psi | 57% | 2270 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 35,143 psi | 73% | 2359 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 33,446 psi | 70% | 2362 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 82% | 32,822 psi | 69% | 2365 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 29,834 psi | 62% | 2362 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,125 psi | 65% | 2290 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,007 psi | 59% | 2362 fps | 95.5% |
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 38 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 156gr | Lapua Naturalis. Alliant Reloder-26 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,677 fps. Accurate 3100 gives the best case fill at 100 %, and 38 of the 38 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. The 155.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 156gr | Lapua Naturalis 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.