Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 145gr | Prvi Partizan SP 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-16 and Alliant Reloder-26.
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% | 39,900 psi | 83% | 2638 fps | 95.9% |
| Accurate 4064 | <<locked>> | 82% | 41,162 psi | 86% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,496 psi | 89% | 2713 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 42,728 psi | 89% | 2628 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,960 psi | 90% | 2762 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,264 psi | 88% | 2651 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,685 psi | 89% | 2664 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,047 psi | 88% | 2723 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,061 psi | 88% | 2749 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,435 psi | 80% | 2674 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,685 psi | 89% | 2828 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 42,148 psi | 88% | 2661 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 43,192 psi | 90% | 2667 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,321 psi | 86% | 2661 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 74% | 1722 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,192 psi | 88% | 2612 fps | 98.7% |
| IMR 4831 | <<locked>> | 92% | 40,799 psi | 85% | 2661 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 42,119 psi | 88% | 2615 fps | 99.7% |
| Lovex S065 | <<locked>> | 88% | 41,510 psi | 87% | 2608 fps | 96.6% |
| Norma 203B | <<locked>> | 82% | 42,003 psi | 88% | 2651 fps | 99% |
| Norma URP | <<locked>> | 92% | 42,453 psi | 89% | 2707 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 82% | 41,553 psi | 87% | 2667 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 92% | 41,379 psi | 86% | 2694 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 75% | 1768 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,858 psi | 87% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,293 psi | 88% | 2733 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,351 psi | 88% | 2746 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 86% | 42,322 psi | 88% | 2654 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,510 psi | 87% | 2608 fps | 96.6% |
| Shooters World Precision | <<locked>> | 82% | 42,119 psi | 88% | 2615 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,596 psi | 85% | 2654 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,192 psi | 88% | 2539 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 43,004 psi | 90% | 2657 fps | 99.4% |
| Somchem S365 | <<locked>> | 96% | 43,279 psi | 90% | 2766 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,162 psi | 86% | 2592 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 90% | 41,698 psi | 87% | 2654 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 82% | 42,467 psi | 89% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 40,988 psi | 86% | 2657 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,872 psi | 87% | 2749 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,727 psi | 87% | 2635 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,432 psi | 72% | 2674 fps | 98.7% |
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% | 37,347 psi | 78% | 2589 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 38,566 psi | 81% | 2562 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,198 psi | 67% | 2487 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 37,710 psi | 79% | 2526 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,074 psi | 84% | 2700 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,246 psi | 78% | 2549 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,059 psi | 84% | 2612 fps | 98.3% |
| Alliant Reloder-16 | 41.8 gr | 84% | 32,837 psi | 69% | 2503 fps | 95.3% |
| Alliant Reloder-17 | 42.9 gr | 80% | 32,169 psi | 67% | 2516 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,139 psi | 63% | 2461 fps | 95.9% |
| Alliant Reloder-26 | 51.6 gr | 94% | 34,650 psi | 72% | 2635 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 36,811 psi | 77% | 2552 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 80% | 37,797 psi | 79% | 2556 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,166 psi | 59% | 2349 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 55% | 1542 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,595 psi | 83% | 2559 fps | 98.2% |
| IMR 4831 | <<locked>> | 86% | 33,634 psi | 70% | 2503 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 39,537 psi | 83% | 2566 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 36,709 psi | 77% | 2503 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 39,436 psi | 82% | 2602 fps | 98.6% |
| Norma URP | <<locked>> | 84% | 32,837 psi | 69% | 2493 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 38,769 psi | 81% | 2608 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 38,943 psi | 81% | 2641 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,629 psi | 56% | 1575 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,243 psi | 72% | 2582 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,243 psi | 72% | 2556 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,999 psi | 77% | 2625 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 34,606 psi | 72% | 2493 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,709 psi | 77% | 2503 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 39,537 psi | 83% | 2566 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,578 psi | 74% | 2546 fps | 97.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,347 psi | 78% | 2451 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,592 psi | 74% | 2503 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 25,860 psi | 54% | 2336 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 33,721 psi | 70% | 2438 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,200 psi | 71% | 2493 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 39,900 psi | 83% | 2562 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,765 psi | 71% | 2500 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 90% | 30,269 psi | 63% | 2484 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,008 psi | 63% | 2365 fps | 96.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,384 psi | 59% | 2480 fps | 95.3% |
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 | 145gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,828 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,828 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 145.0 gr projectile in 0.284" calls for a 1:13.0 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-16, Alliant Reloder-26 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 145gr | Prvi Partizan SP 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.