Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 150gr | Barnes TTSX BT bullet and 50 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% | 41,205 psi | 86% | 2530 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,684 psi | 87% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 40,393 psi | 84% | 2625 fps | 98% |
| ADI AR 2208 | <<locked>> | 84% | 41,350 psi | 86% | 2556 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,727 psi | 87% | 2687 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 40,698 psi | 85% | 2572 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,060 psi | 86% | 2585 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 43,134 psi | 90% | 2697 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 43,192 psi | 90% | 2723 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,767 psi | 77% | 2592 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,944 psi | 86% | 2743 fps | 97.8% |
| Bofors RP3 | <<locked>> | 86% | 43,018 psi | 90% | 2628 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 41,408 psi | 87% | 2585 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 42,395 psi | 89% | 2635 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,887 psi | 88% | 2635 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,157 psi | 73% | 1677 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,625 psi | 85% | 2533 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 41,713 psi | 87% | 2631 fps | 98.3% |
| IMR 4895 | <<locked>> | 82% | 42,105 psi | 88% | 2615 fps | 99.2% |
| Lovex S062 | <<locked>> | 84% | 43,149 psi | 90% | 2589 fps | 99.8% |
| Lovex S065 | <<locked>> | 90% | 42,496 psi | 89% | 2582 fps | 97% |
| Lovex S070 | <<locked>> | 92% | 43,047 psi | 90% | 2612 fps | 96% |
| Norma 203B | <<locked>> | 84% | 43,178 psi | 90% | 2628 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 40,901 psi | 85% | 2631 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 84% | 42,989 psi | 90% | 2644 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 94% | 42,540 psi | 89% | 2667 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,476 psi | 74% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,061 psi | 88% | 2572 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 43,265 psi | 90% | 2687 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 43,192 psi | 90% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 43,207 psi | 90% | 2703 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,741 psi | 85% | 2664 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 82% | 42,380 psi | 89% | 2552 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 88% | 43,221 psi | 90% | 2625 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,496 psi | 89% | 2582 fps | 97% |
| Shooters World Precision | <<locked>> | 84% | 43,149 psi | 90% | 2589 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 92% | 43,047 psi | 90% | 2612 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,003 psi | 88% | 2635 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 40,944 psi | 86% | 2470 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 41,408 psi | 87% | 2579 fps | 99.3% |
| Somchem S365 | <<locked>> | 96% | 41,626 psi | 87% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 41,756 psi | 87% | 2530 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,656 psi | 89% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 42,177 psi | 88% | 2562 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 42,685 psi | 89% | 2625 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 40,959 psi | 86% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 41,930 psi | 88% | 2631 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,813 psi | 83% | 2664 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 43,047 psi | 90% | 2612 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,779 psi | 68% | 2585 fps | 98.2% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 38,682 psi | 81% | 2487 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,637 psi | 77% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,764 psi | 68% | 2461 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 36,463 psi | 76% | 2454 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,783 psi | 81% | 2625 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,810 psi | 75% | 2474 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,435 psi | 80% | 2533 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,649 psi | 70% | 2480 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,864 psi | 64% | 2438 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,761 psi | 60% | 2382 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,563 psi | 74% | 2618 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 35,259 psi | 74% | 2474 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 80% | 36,187 psi | 76% | 2477 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,819 psi | 60% | 2329 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,146 psi | 82% | 2582 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 55% | 1499 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,261 psi | 80% | 2487 fps | 98% |
| IMR 4831 | <<locked>> | 86% | 31,908 psi | 67% | 2421 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,378 psi | 82% | 2562 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 38,000 psi | 79% | 2490 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 37,579 psi | 79% | 2480 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 40,306 psi | 84% | 2556 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 37,797 psi | 79% | 2520 fps | 98.4% |
| Norma URP | <<locked>> | 86% | 33,402 psi | 70% | 2467 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,405 psi | 78% | 2533 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 37,405 psi | 78% | 2559 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 55% | 1532 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,160 psi | 82% | 2513 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,306 psi | 84% | 2631 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,924 psi | 69% | 2507 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,735 psi | 68% | 2480 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 35,549 psi | 74% | 2543 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 39,682 psi | 83% | 2503 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,025 psi | 69% | 2418 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,579 psi | 79% | 2480 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 38,000 psi | 79% | 2490 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 40,306 psi | 84% | 2556 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,171 psi | 71% | 2467 fps | 97.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,926 psi | 75% | 2379 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 34,084 psi | 71% | 2428 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 24,439 psi | 51% | 2251 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 39,189 psi | 82% | 2487 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,900 psi | 83% | 2497 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,343 psi | 68% | 2365 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 32,808 psi | 69% | 2418 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 38,363 psi | 80% | 2487 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,360 psi | 72% | 2470 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 30,632 psi | 64% | 2454 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,718 psi | 60% | 2290 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,819 psi | 60% | 2454 fps | 96% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 50 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 150gr | Barnes TTSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,743 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 150.0 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.