Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 140gr | Barnes X S bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 62 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 4064 | <<locked>> | 82% | 42,482 psi | 89% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,656 psi | 89% | 2720 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 84% | 42,627 psi | 89% | 2631 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,989 psi | 90% | 2766 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,699 psi | 89% | 2664 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,062 psi | 90% | 2674 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,061 psi | 88% | 2723 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 41,959 psi | 88% | 2753 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,682 psi | 81% | 2677 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,583 psi | 89% | 2822 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 42,757 psi | 89% | 2674 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 82% | 40,770 psi | 85% | 2618 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,162 psi | 86% | 2661 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,236 psi | 90% | 2717 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 75% | 1732 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,351 psi | 88% | 2618 fps | 98.1% |
| IMR 4831 | <<locked>> | 92% | 40,799 psi | 85% | 2664 fps | 97.2% |
| Lovex S062 | <<locked>> | 82% | 42,670 psi | 89% | 2628 fps | 99.4% |
| Lovex S065 | <<locked>> | 88% | 41,843 psi | 87% | 2615 fps | 95.8% |
| Norma 203B | <<locked>> | 82% | 42,467 psi | 89% | 2664 fps | 98.6% |
| Norma URP | <<locked>> | 92% | 42,206 psi | 88% | 2710 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 82% | 41,669 psi | 87% | 2674 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 76% | 1775 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,872 psi | 87% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,090 psi | 88% | 2736 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,293 psi | 88% | 2743 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 86% | 42,888 psi | 90% | 2671 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,843 psi | 87% | 2615 fps | 95.8% |
| Shooters World Precision | <<locked>> | 82% | 42,670 psi | 89% | 2628 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,799 psi | 85% | 2661 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,380 psi | 89% | 2549 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 40,814 psi | 85% | 2618 fps | 98.6% |
| Somchem S365 | <<locked>> | 96% | 42,960 psi | 90% | 2766 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 86% | 41,510 psi | 87% | 2605 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 90% | 41,684 psi | 87% | 2657 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 82% | 42,699 psi | 89% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 41,002 psi | 86% | 2661 fps | 96.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,843 psi | 87% | 2756 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,655 psi | 87% | 2635 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,809 psi | 73% | 2667 fps | 97.7% |
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 4064 | <<locked>> | 80% | 39,972 psi | 84% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,302 psi | 74% | 2562 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,913 psi | 79% | 2533 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,205 psi | 84% | 2703 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,710 psi | 79% | 2559 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,495 psi | 85% | 2621 fps | 97.7% |
| Alliant Reloder-16 | 40.9 gr | 86% | 35,331 psi | 74% | 2562 fps | 95.3% |
| Alliant Reloder-17 | 41 gr | 80% | 32,793 psi | 69% | 2526 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,980 psi | 65% | 2477 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,521 psi | 78% | 2703 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 37,768 psi | 79% | 2572 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,334 psi | 80% | 2566 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,879 psi | 65% | 2418 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,596 psi | 85% | 2664 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 56% | 1549 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,798 psi | 83% | 2566 fps | 97.6% |
| IMR 4831 | <<locked>> | 86% | 34,084 psi | 71% | 2516 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 40,118 psi | 84% | 2579 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 39,668 psi | 83% | 2569 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 39,900 psi | 83% | 2612 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 35,534 psi | 74% | 2559 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,001 psi | 81% | 2618 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,108 psi | 57% | 1585 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,708 psi | 73% | 2592 fps | 99.2% |
| ReloadSwiss RS 62 | 45 gr | 88% | 37,057 psi | 77% | 2625 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,595 psi | 83% | 2680 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,781 psi | 75% | 2520 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,668 psi | 83% | 2569 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 40,118 psi | 84% | 2579 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,172 psi | 76% | 2559 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,739 psi | 79% | 2464 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,347 psi | 76% | 2520 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 27,006 psi | 56% | 2362 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 34,664 psi | 72% | 2461 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 86% | 36,854 psi | 77% | 2556 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 40,176 psi | 84% | 2572 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 36,332 psi | 76% | 2559 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 33,112 psi | 69% | 2556 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,661 psi | 64% | 2375 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,024 psi | 65% | 2546 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 40 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 140gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,822 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,822 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 40 of the 40 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:10.5 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. Alliant Reloder-17, ReloadSwiss RS 62, Alliant Reloder-16 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 140gr | Barnes X S 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.