Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 140gr | Sellier & Bellot FMJ bullet and 46 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 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% | 41,916 psi | 88% | 2631 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 42,177 psi | 88% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 40,741 psi | 85% | 2720 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 84% | 41,365 psi | 86% | 2644 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,727 psi | 87% | 2779 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,002 psi | 86% | 2671 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,452 psi | 87% | 2680 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 94% | 43,221 psi | 90% | 2785 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 40,596 psi | 85% | 2759 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,028 psi | 77% | 2677 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,046 psi | 86% | 2828 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 40,567 psi | 85% | 2671 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 41,698 psi | 87% | 2677 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 42,453 psi | 89% | 2723 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,959 psi | 88% | 2726 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 74% | 1752 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,799 psi | 85% | 2625 fps | 98.1% |
| IMR 4831 | <<locked>> | 94% | 42,090 psi | 88% | 2730 fps | 97.9% |
| IMR 4895 | <<locked>> | 82% | 42,424 psi | 89% | 2713 fps | 98.8% |
| Lovex S062 | <<locked>> | 84% | 43,308 psi | 90% | 2680 fps | 99.6% |
| Lovex S065 | <<locked>> | 90% | 42,670 psi | 89% | 2671 fps | 96.4% |
| Norma 203B | <<locked>> | 82% | 40,799 psi | 85% | 2671 fps | 98.5% |
| Norma URP | <<locked>> | 92% | 40,799 psi | 85% | 2717 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 84% | 43,178 psi | 90% | 2740 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 94% | 42,728 psi | 89% | 2759 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 75% | 1791 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 43,221 psi | 90% | 2825 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,567 psi | 85% | 2740 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,930 psi | 86% | 2753 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 82% | 42,786 psi | 89% | 2651 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 86% | 40,727 psi | 85% | 2667 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,670 psi | 89% | 2671 fps | 96.4% |
| Shooters World Precision | <<locked>> | 84% | 43,308 psi | 90% | 2680 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,959 psi | 88% | 2723 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 41,060 psi | 86% | 2562 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 41,495 psi | 87% | 2671 fps | 99% |
| Somchem S365 | <<locked>> | 96% | 41,553 psi | 87% | 2776 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 42,061 psi | 88% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,743 psi | 89% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 42,322 psi | 88% | 2657 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 42,772 psi | 89% | 2717 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 82% | 41,278 psi | 86% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 42,264 psi | 88% | 2723 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,045 psi | 84% | 2756 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 43,120 psi | 90% | 2700 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,185 psi | 69% | 2667 fps | 97.6% |
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% | 39,479 psi | 82% | 2589 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,304 psi | 78% | 2582 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,199 psi | 69% | 2552 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 36,463 psi | 76% | 2539 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,943 psi | 81% | 2713 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,114 psi | 75% | 2562 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,638 psi | 81% | 2625 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,953 psi | 71% | 2569 fps | 95.2% |
| Alliant Reloder-17 | 42.7 gr | 80% | 31,024 psi | 65% | 2520 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,835 psi | 64% | 2516 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,926 psi | 75% | 2703 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 35,621 psi | 74% | 2566 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 80% | 36,463 psi | 76% | 2566 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,109 psi | 61% | 2411 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,392 psi | 82% | 2674 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,179 psi | 55% | 1562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,276 psi | 80% | 2572 fps | 97.5% |
| IMR 4831 | <<locked>> | 88% | 34,403 psi | 72% | 2562 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,581 psi | 83% | 2654 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 38,189 psi | 80% | 2579 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 40,132 psi | 84% | 2618 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 38,058 psi | 80% | 2612 fps | 97.9% |
| Norma URP | <<locked>> | 86% | 33,692 psi | 70% | 2552 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,579 psi | 79% | 2625 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 40,176 psi | 84% | 2703 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 56% | 1601 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,040 psi | 69% | 2589 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,491 psi | 74% | 2628 fps | 95.5% |
| ReloadSwiss RS 70 | 48.8 gr | 90% | 38,232 psi | 80% | 2690 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 40,161 psi | 84% | 2598 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,504 psi | 70% | 2510 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,132 psi | 84% | 2618 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 38,189 psi | 80% | 2579 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,534 psi | 72% | 2559 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,071 psi | 75% | 2467 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 34,505 psi | 72% | 2516 fps | 97.4% |
| Somchem S365 | 41.5 gr | 82% | 26,498 psi | 55% | 2392 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 39,392 psi | 82% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,103 psi | 84% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,677 psi | 68% | 2454 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 35,331 psi | 74% | 2559 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 38,551 psi | 81% | 2579 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,592 psi | 72% | 2556 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 32,953 psi | 69% | 2592 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,037 psi | 61% | 2369 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,196 psi | 61% | 2533 fps | 95% |
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 46 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 140gr | Sellier & Bellot FMJ. Alliant Reloder-26 delivers the highest muzzle velocity at 2,828 fps; across all powders the maximum-charge window runs from 1,752 fps to 2,828 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.5 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. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 140gr | Sellier & Bellot FMJ 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.