Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 139gr | Reichenberg HDB Universal 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-16, Somchem S365 and Alliant Reloder-17.
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 2495 | <<locked>> | 82% | 41,147 psi | 86% | 2625 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,452 psi | 87% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,641 psi | 89% | 2762 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 86% | 43,163 psi | 90% | 2684 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,915 psi | 85% | 2762 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,786 psi | 89% | 2710 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 43,207 psi | 90% | 2723 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,424 psi | 89% | 2772 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,380 psi | 89% | 2802 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,172 psi | 76% | 2661 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,147 psi | 84% | 2808 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 42,627 psi | 89% | 2717 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 40,814 psi | 85% | 2664 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,626 psi | 87% | 2713 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,017 psi | 86% | 2713 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,099 psi | 73% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,859 psi | 90% | 2671 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 40,944 psi | 86% | 2710 fps | 97.4% |
| IMR 4895 | <<locked>> | 82% | 41,524 psi | 87% | 2700 fps | 98.6% |
| Lovex S062 | <<locked>> | 84% | 42,656 psi | 89% | 2674 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 41,858 psi | 87% | 2657 fps | 96% |
| Norma 203B | <<locked>> | 84% | 42,511 psi | 89% | 2710 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 42,670 psi | 89% | 2759 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 84% | 42,279 psi | 88% | 2726 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 75% | 1795 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,308 psi | 88% | 2769 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,438 psi | 89% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,453 psi | 89% | 2782 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,830 psi | 89% | 2795 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 41,843 psi | 87% | 2635 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 42,525 psi | 89% | 2707 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,858 psi | 87% | 2657 fps | 96% |
| Shooters World Precision | <<locked>> | 84% | 42,656 psi | 89% | 2674 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,060 psi | 86% | 2710 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,931 psi | 90% | 2598 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,279 psi | 90% | 2710 fps | 99.1% |
| Somchem S365 | <<locked>> | 96% | 40,785 psi | 85% | 2766 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 41,321 psi | 86% | 2621 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,814 psi | 87% | 2628 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,452 psi | 87% | 2644 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 41,945 psi | 88% | 2707 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 43,033 psi | 90% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 41,191 psi | 86% | 2707 fps | 97% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,146 psi | 82% | 2743 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,235 psi | 88% | 2687 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,445 psi | 68% | 2644 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,743 psi | 89% | 2703 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 2495 | <<locked>> | 80% | 38,493 psi | 80% | 2575 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,376 psi | 76% | 2569 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,635 psi | 72% | 2592 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 35,911 psi | 75% | 2530 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,130 psi | 80% | 2700 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,259 psi | 74% | 2549 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,058 psi | 80% | 2615 fps | 97.2% |
| Alliant Reloder-16 | 43.1 gr | 88% | 35,389 psi | 74% | 2608 fps | 95.6% |
| Alliant Reloder-17 | 42.2 gr | 80% | 30,560 psi | 64% | 2510 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,240 psi | 63% | 2500 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,420 psi | 78% | 2743 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 34,737 psi | 73% | 2549 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 80% | 35,868 psi | 75% | 2556 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,342 psi | 63% | 2451 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,479 psi | 80% | 2661 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 54% | 1562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,666 psi | 79% | 2562 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 33,605 psi | 70% | 2549 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,943 psi | 81% | 2644 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 37,565 psi | 78% | 2569 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,320 psi | 82% | 2605 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 37,420 psi | 78% | 2605 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 35,128 psi | 73% | 2595 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 36,782 psi | 77% | 2612 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 55% | 1601 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,537 psi | 83% | 2713 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,518 psi | 68% | 2579 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,043 psi | 77% | 2667 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,016 psi | 84% | 2733 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,276 psi | 82% | 2585 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 32,866 psi | 69% | 2497 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,320 psi | 82% | 2605 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 37,565 psi | 78% | 2569 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,750 psi | 71% | 2543 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,491 psi | 74% | 2461 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,707 psi | 70% | 2503 fps | 97% |
| Somchem S365 | 42 gr | 84% | 27,746 psi | 58% | 2434 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 38,624 psi | 81% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,436 psi | 82% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,097 psi | 67% | 2444 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 34,563 psi | 72% | 2543 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 37,971 psi | 79% | 2572 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,245 psi | 76% | 2602 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 32,169 psi | 67% | 2579 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,429 psi | 64% | 2411 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,313 psi | 63% | 2572 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,118 psi | 84% | 2654 fps | 98.7% |
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 | 139gr | Reichenberg HDB Universal. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,812 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,812 fps. Alliant Reloder-23 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 68–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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-16, Somchem S365, Alliant Reloder-17 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 139gr | Reichenberg HDB Universal 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.