Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 130gr | Speer Boat-Tail bullet and 44 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% | 40,828 psi | 85% | 2723 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,017 psi | 86% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,221 psi | 88% | 2854 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 86% | 42,960 psi | 90% | 2782 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,480 psi | 85% | 2851 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,496 psi | 89% | 2805 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,960 psi | 90% | 2818 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,264 psi | 88% | 2867 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,308 psi | 88% | 2900 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,143 psi | 76% | 2753 fps | 97.1% |
| Bofors RP3 | <<locked>> | 86% | 42,177 psi | 88% | 2808 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 84% | 40,451 psi | 85% | 2756 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,365 psi | 86% | 2805 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,930 psi | 86% | 2812 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 73% | 1827 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,482 psi | 89% | 2762 fps | 97.9% |
| IMR 4831 | <<locked>> | 94% | 40,640 psi | 85% | 2802 fps | 96.9% |
| IMR 4895 | <<locked>> | 82% | 41,133 psi | 86% | 2792 fps | 98.1% |
| Lovex S062 | <<locked>> | 84% | 42,279 psi | 88% | 2766 fps | 99.2% |
| Norma 203B | <<locked>> | 84% | 42,279 psi | 88% | 2805 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 42,395 psi | 89% | 2851 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 84% | 41,989 psi | 88% | 2822 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 74% | 1873 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,959 psi | 88% | 2864 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,235 psi | 88% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,090 psi | 88% | 2874 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,714 psi | 89% | 2890 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 82% | 41,669 psi | 87% | 2733 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 88% | 42,308 psi | 88% | 2805 fps | 98.9% |
| Shooters World Precision | <<locked>> | 84% | 42,279 psi | 88% | 2766 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,785 psi | 85% | 2802 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,091 psi | 90% | 2795 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,583 psi | 89% | 2694 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,178 psi | 90% | 2808 fps | 98.9% |
| Somchem S365 | <<locked>> | 98% | 43,192 psi | 90% | 2917 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 40,872 psi | 85% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,727 psi | 87% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,263 psi | 86% | 2740 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 92% | 41,713 psi | 87% | 2799 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 42,714 psi | 89% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,915 psi | 85% | 2799 fps | 96.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,856 psi | 81% | 2831 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,163 psi | 88% | 2779 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,656 psi | 89% | 2805 fps | 98.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 38,261 psi | 80% | 2674 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,172 psi | 76% | 2661 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 36,767 psi | 77% | 2736 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,563 psi | 74% | 2615 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,884 psi | 79% | 2789 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,070 psi | 73% | 2641 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,753 psi | 79% | 2703 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,260 psi | 78% | 2753 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 82% | 32,271 psi | 67% | 2648 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,923 psi | 67% | 2638 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 34,447 psi | 72% | 2638 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 38,014 psi | 79% | 2700 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,111 psi | 67% | 2585 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,276 psi | 80% | 2756 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 55% | 1637 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,304 psi | 78% | 2651 fps | 96.6% |
| IMR 4831 | <<locked>> | 90% | 35,621 psi | 74% | 2690 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 38,653 psi | 81% | 2740 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 37,159 psi | 78% | 2657 fps | 98.3% |
| Norma 203B | <<locked>> | 80% | 37,173 psi | 78% | 2694 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 37,202 psi | 78% | 2740 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,477 psi | 76% | 2697 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 55% | 1677 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,334 psi | 82% | 2808 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,155 psi | 67% | 2661 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,738 psi | 77% | 2753 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,001 psi | 84% | 2828 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 39,175 psi | 82% | 2680 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 32,445 psi | 68% | 2579 fps | 96.3% |
| Shooters World Precision | <<locked>> | 80% | 37,159 psi | 78% | 2657 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,591 psi | 70% | 2631 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,567 psi | 85% | 2743 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,230 psi | 74% | 2549 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 33,547 psi | 70% | 2592 fps | 96.4% |
| Somchem S365 | <<locked>> | 84% | 27,427 psi | 57% | 2510 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 38,319 psi | 80% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,015 psi | 82% | 2674 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,705 psi | 66% | 2526 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 36,651 psi | 77% | 2687 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 37,637 psi | 79% | 2661 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 38,493 psi | 80% | 2746 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 34,040 psi | 71% | 2717 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,256 psi | 67% | 2549 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,856 psi | 83% | 2746 fps | 98.3% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 70 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 130gr | Speer Boat-Tail. Somchem S365 delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,827 fps to 2,917 fps. Accurate 3100 gives the best case fill at 100 %, and 70 of the 70 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 130.0 gr projectile in 0.284" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, Alliant Reloder-19 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.