Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 150gr | Nosler Partition bullet and 41 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% | 39,943 psi | 83% | 2592 fps | 96.1% |
| Accurate 4064 | <<locked>> | 82% | 40,988 psi | 86% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,467 psi | 89% | 2657 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 84% | 42,641 psi | 89% | 2575 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 43,062 psi | 90% | 2713 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,177 psi | 88% | 2595 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,554 psi | 89% | 2608 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,959 psi | 88% | 2667 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 41,785 psi | 87% | 2694 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,392 psi | 80% | 2625 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,699 psi | 89% | 2776 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 42,177 psi | 88% | 2608 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 42,946 psi | 90% | 2612 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,292 psi | 86% | 2608 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,360 psi | 74% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,003 psi | 88% | 2556 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 40,785 psi | 85% | 2608 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 41,959 psi | 88% | 2559 fps | 99.7% |
| Lovex S065 | <<locked>> | 88% | 41,292 psi | 86% | 2552 fps | 96.7% |
| Norma 203B | <<locked>> | 82% | 41,916 psi | 88% | 2598 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 42,424 psi | 89% | 2654 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 82% | 41,640 psi | 87% | 2615 fps | 99% |
| Ramshot Hunter | <<locked>> | 92% | 41,481 psi | 87% | 2644 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 75% | 1726 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,785 psi | 87% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,148 psi | 88% | 2680 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,279 psi | 88% | 2694 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 86% | 42,047 psi | 88% | 2598 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,292 psi | 86% | 2552 fps | 96.7% |
| Shooters World Precision | <<locked>> | 82% | 41,959 psi | 88% | 2559 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,698 psi | 85% | 2605 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,018 psi | 88% | 2484 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 43,004 psi | 90% | 2605 fps | 99.5% |
| Somchem S365 | <<locked>> | 96% | 43,105 psi | 90% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 40,915 psi | 85% | 2536 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 90% | 41,611 psi | 87% | 2602 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 42,409 psi | 89% | 2556 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 40,959 psi | 86% | 2605 fps | 97.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,785 psi | 87% | 2697 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,626 psi | 87% | 2582 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,301 psi | 72% | 2625 fps | 98.8% |
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% | 37,231 psi | 78% | 2536 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,638 psi | 81% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,184 psi | 67% | 2438 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 37,739 psi | 79% | 2477 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,074 psi | 84% | 2651 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,275 psi | 78% | 2500 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,914 psi | 83% | 2556 fps | 98.4% |
| Alliant Reloder-16 | 40.6 gr | 84% | 32,764 psi | 68% | 2454 fps | 95.6% |
| Alliant Reloder-17 | 41.7 gr | 80% | 32,169 psi | 67% | 2467 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,239 psi | 59% | 2359 fps | 95.2% |
| Alliant Reloder-26 | 50.2 gr | 94% | 34,679 psi | 72% | 2592 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 36,912 psi | 77% | 2503 fps | 99% |
| Hodgdon H380 | <<locked>> | 80% | 37,695 psi | 79% | 2503 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,224 psi | 59% | 2303 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 55% | 1503 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,624 psi | 83% | 2510 fps | 98.3% |
| IMR 4831 | <<locked>> | 84% | 31,241 psi | 65% | 2398 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 39,320 psi | 82% | 2510 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 36,666 psi | 77% | 2454 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 39,291 psi | 82% | 2546 fps | 98.7% |
| Norma URP | <<locked>> | 84% | 32,793 psi | 69% | 2448 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,769 psi | 81% | 2559 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 38,725 psi | 81% | 2585 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 56% | 1535 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,243 psi | 72% | 2533 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,171 psi | 71% | 2507 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,811 psi | 77% | 2569 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,664 psi | 72% | 2448 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,666 psi | 77% | 2454 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 39,320 psi | 82% | 2510 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,549 psi | 74% | 2493 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,289 psi | 78% | 2398 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,607 psi | 74% | 2454 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 25,759 psi | 54% | 2287 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 33,765 psi | 71% | 2392 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 31,995 psi | 67% | 2392 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 39,769 psi | 83% | 2510 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,562 psi | 70% | 2444 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 30,139 psi | 63% | 2434 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,878 psi | 62% | 2316 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,326 psi | 59% | 2434 fps | 95.6% |
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 41 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 150gr | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,776 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,776 fps. Accurate 3100 gives the best case fill at 100 %, and 41 of the 41 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:11.5 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 | 150gr | Nosler Partition 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.