Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 140gr | Sierra Pro-Hunter bullet and 46 powders. The key underlying parameters are shown in the table above.
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% | 42,192 psi | 88% | 2638 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 42,453 psi | 89% | 2680 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 40,930 psi | 86% | 2723 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 84% | 41,611 psi | 87% | 2651 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,974 psi | 88% | 2785 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,031 psi | 86% | 2671 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,452 psi | 87% | 2684 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,857 psi | 85% | 2736 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 40,756 psi | 85% | 2766 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,188 psi | 78% | 2684 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,466 psi | 87% | 2841 fps | 97.3% |
| Bofors RP3 | <<locked>> | 84% | 40,828 psi | 85% | 2677 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 41,901 psi | 88% | 2684 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 42,685 psi | 89% | 2730 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 42,206 psi | 88% | 2733 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 74% | 1752 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 41,017 psi | 86% | 2631 fps | 98.2% |
| IMR 4831 | <<locked>> | 94% | 42,032 psi | 88% | 2730 fps | 97.9% |
| IMR 4895 | <<locked>> | 82% | 42,453 psi | 89% | 2713 fps | 98.9% |
| Lovex S062 | <<locked>> | 82% | 40,930 psi | 86% | 2635 fps | 99.4% |
| Lovex S065 | <<locked>> | 90% | 42,888 psi | 90% | 2677 fps | 96.5% |
| Norma 203B | <<locked>> | 82% | 40,770 psi | 85% | 2671 fps | 98.5% |
| Norma URP | <<locked>> | 92% | 41,046 psi | 86% | 2723 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 82% | 40,538 psi | 85% | 2690 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 94% | 42,917 psi | 90% | 2766 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 75% | 1795 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 40,567 psi | 85% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,785 psi | 85% | 2746 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,089 psi | 86% | 2756 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 82% | 42,757 psi | 89% | 2651 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 86% | 40,973 psi | 86% | 2674 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,888 psi | 90% | 2677 fps | 96.5% |
| Shooters World Precision | <<locked>> | 82% | 40,930 psi | 86% | 2635 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,148 psi | 88% | 2726 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 41,104 psi | 86% | 2562 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 41,727 psi | 87% | 2677 fps | 99% |
| Somchem S365 | <<locked>> | 96% | 41,785 psi | 87% | 2782 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 42,061 psi | 88% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,989 psi | 90% | 2644 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 42,569 psi | 89% | 2661 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 43,018 psi | 90% | 2723 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 41,263 psi | 86% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 42,482 psi | 89% | 2730 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,263 psi | 84% | 2762 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 43,294 psi | 90% | 2703 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,286 psi | 70% | 2671 fps | 97.7% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 39,537 psi | 83% | 2592 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,362 psi | 78% | 2582 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,431 psi | 70% | 2559 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,724 psi | 77% | 2546 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,175 psi | 82% | 2720 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,129 psi | 75% | 2566 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,914 psi | 81% | 2628 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,924 psi | 71% | 2569 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,227 psi | 65% | 2526 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,009 psi | 65% | 2523 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,085 psi | 75% | 2710 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 35,621 psi | 74% | 2569 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 80% | 36,666 psi | 77% | 2572 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,124 psi | 61% | 2411 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,363 psi | 82% | 2677 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 55% | 1565 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,537 psi | 81% | 2579 fps | 97.6% |
| IMR 4831 | <<locked>> | 88% | 34,621 psi | 72% | 2569 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 39,827 psi | 83% | 2661 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 38,406 psi | 80% | 2585 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 37,956 psi | 79% | 2572 fps | 95% |
| Norma 203B | <<locked>> | 80% | 38,276 psi | 80% | 2618 fps | 98% |
| Norma URP | <<locked>> | 86% | 33,910 psi | 71% | 2562 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,840 psi | 79% | 2631 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 40,364 psi | 84% | 2710 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 55% | 1601 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,228 psi | 69% | 2595 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,447 psi | 74% | 2628 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,406 psi | 80% | 2697 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 40,190 psi | 84% | 2598 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,721 psi | 70% | 2516 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,956 psi | 79% | 2572 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 38,406 psi | 80% | 2585 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,519 psi | 72% | 2559 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,332 psi | 76% | 2470 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 34,548 psi | 72% | 2520 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 26,687 psi | 56% | 2398 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 39,653 psi | 83% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,379 psi | 84% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,924 psi | 69% | 2461 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 35,520 psi | 74% | 2562 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 38,798 psi | 81% | 2585 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,766 psi | 73% | 2562 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 94% | 33,141 psi | 69% | 2598 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,182 psi | 61% | 2375 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,370 psi | 61% | 2539 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 140gr | Sierra Pro-Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,841 fps; across all powders the maximum-charge window runs from 1,752 fps to 2,841 fps. Accurate 3100 gives the best case fill at 100 %, and 73 of the 73 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 67–90 %, 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. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.