Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 140gr | Barnes MRX BT bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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>> | 84% | 42,293 psi | 88% | 2648 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 42,641 psi | 89% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 41,611 psi | 87% | 2743 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 86% | 42,525 psi | 89% | 2671 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,931 psi | 90% | 2805 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,974 psi | 88% | 2690 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,424 psi | 89% | 2703 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,756 psi | 87% | 2756 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,640 psi | 87% | 2785 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,375 psi | 74% | 2641 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,291 psi | 82% | 2792 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 41,365 psi | 86% | 2694 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 42,670 psi | 89% | 2700 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,611 psi | 85% | 2690 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,321 psi | 84% | 2697 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,099 psi | 73% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,815 psi | 89% | 2680 fps | 99.1% |
| IMR 4064 | <<locked>> | 84% | 41,887 psi | 88% | 2651 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 42,830 psi | 89% | 2746 fps | 98% |
| IMR 4895 | <<locked>> | 82% | 40,727 psi | 85% | 2684 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 82% | 42,844 psi | 90% | 2694 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 41,553 psi | 87% | 2651 fps | 99.4% |
| Lovex S065 | <<locked>> | 90% | 41,002 psi | 86% | 2641 fps | 95.9% |
| Norma 201 | <<locked>> | 82% | 43,149 psi | 90% | 2671 fps | 99.6% |
| Norma 203B | <<locked>> | 84% | 41,742 psi | 87% | 2694 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 41,887 psi | 88% | 2743 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 84% | 41,336 psi | 86% | 2707 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,360 psi | 74% | 1785 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,553 psi | 87% | 2753 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,437 psi | 87% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,582 psi | 87% | 2766 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,105 psi | 88% | 2779 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 40,944 psi | 86% | 2618 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 88% | 41,553 psi | 87% | 2687 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,002 psi | 86% | 2641 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,844 psi | 90% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 41,553 psi | 87% | 2651 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 43,047 psi | 90% | 2746 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,656 psi | 89% | 2687 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,989 psi | 88% | 2579 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,409 psi | 89% | 2694 fps | 99.1% |
| Somchem S365 | <<locked>> | 98% | 42,409 psi | 89% | 2795 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 43,047 psi | 90% | 2651 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,075 psi | 86% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,640 psi | 85% | 2628 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 41,205 psi | 86% | 2687 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 42,279 psi | 88% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 43,091 psi | 90% | 2743 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,956 psi | 79% | 2717 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,539 psi | 87% | 2671 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,589 psi | 66% | 2618 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,032 psi | 88% | 2690 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% | 37,101 psi | 78% | 2552 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,128 psi | 73% | 2543 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 33,605 psi | 70% | 2569 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 35,244 psi | 74% | 2513 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,449 psi | 78% | 2684 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,432 psi | 72% | 2530 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,246 psi | 78% | 2595 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,461 psi | 72% | 2585 fps | 95.4% |
| Alliant Reloder-17 | 42.2 gr | 80% | 29,617 psi | 62% | 2480 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,343 psi | 65% | 2533 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,506 psi | 76% | 2720 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 33,779 psi | 71% | 2530 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 37,376 psi | 78% | 2592 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,559 psi | 62% | 2428 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,507 psi | 78% | 2638 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 54% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,118 psi | 84% | 2628 fps | 98.7% |
| IMR 4064 | <<locked>> | 80% | 36,970 psi | 77% | 2546 fps | 97.1% |
| IMR 4831 | <<locked>> | 90% | 35,041 psi | 73% | 2582 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 38,130 psi | 80% | 2628 fps | 97.9% |
| Lovex D073.6 | <<locked>> | 80% | 40,045 psi | 84% | 2641 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 36,695 psi | 77% | 2552 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 38,508 psi | 80% | 2585 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,422 psi | 84% | 2615 fps | 99.2% |
| Norma 203B | <<locked>> | 80% | 36,593 psi | 76% | 2585 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 34,330 psi | 72% | 2575 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 36,042 psi | 75% | 2595 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 55% | 1594 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,783 psi | 81% | 2697 fps | 97.5% |
| ReloadSwiss RS 60 | 42.2 gr | 80% | 31,589 psi | 66% | 2552 fps | 98.5% |
| ReloadSwiss RS 62 | 47.5 gr | 90% | 36,172 psi | 76% | 2648 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,262 psi | 82% | 2717 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 38,334 psi | 80% | 2566 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 31,647 psi | 66% | 2470 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,508 psi | 80% | 2585 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,045 psi | 84% | 2641 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,695 psi | 77% | 2552 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,996 psi | 69% | 2526 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,001 psi | 84% | 2631 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,795 psi | 73% | 2444 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 32,822 psi | 69% | 2484 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 26,701 psi | 56% | 2405 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 37,753 psi | 79% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,464 psi | 80% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,067 psi | 65% | 2418 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,071 psi | 75% | 2579 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,941 psi | 77% | 2549 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 35,215 psi | 74% | 2575 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 96% | 33,388 psi | 70% | 2608 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,733 psi | 62% | 2395 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,472 psi | 62% | 2546 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,131 psi | 82% | 2631 fps | 98.6% |
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 52 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 140gr | Barnes MRX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,805 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,805 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.5 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 140gr | Barnes MRX BT 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.