Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 142gr | Lehigh Defense Controlled Chaos bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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>> | 84% | 42,409 psi | 89% | 2605 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 42,496 psi | 89% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 40,799 psi | 85% | 2684 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 86% | 42,003 psi | 88% | 2615 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,163 psi | 88% | 2743 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,263 psi | 86% | 2635 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 84% | 41,713 psi | 87% | 2644 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,886 psi | 85% | 2690 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 40,944 psi | 86% | 2723 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,853 psi | 73% | 2582 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 42,525 psi | 89% | 2657 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 40,886 psi | 85% | 2641 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 42,192 psi | 88% | 2648 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,641 psi | 89% | 2684 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,380 psi | 89% | 2694 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 73% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,119 psi | 88% | 2621 fps | 98.9% |
| IMR 3031 | <<locked>> | 82% | 43,076 psi | 90% | 2667 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 41,278 psi | 86% | 2592 fps | 97.9% |
| IMR 4831 | <<locked>> | 96% | 42,047 psi | 88% | 2687 fps | 97.6% |
| IMR 4895 | <<locked>> | 84% | 42,670 psi | 89% | 2677 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 82% | 42,453 psi | 89% | 2641 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 41,075 psi | 86% | 2598 fps | 99.2% |
| Lovex S065 | <<locked>> | 92% | 43,134 psi | 90% | 2635 fps | 96.2% |
| Norma 201 | <<locked>> | 82% | 42,656 psi | 89% | 2615 fps | 99.4% |
| Norma 202 | <<locked>> | 82% | 42,815 psi | 89% | 2625 fps | 100% |
| Norma 203B | <<locked>> | 84% | 41,031 psi | 86% | 2635 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 41,002 psi | 86% | 2680 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 84% | 40,538 psi | 85% | 2648 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,389 psi | 74% | 1745 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 40,640 psi | 85% | 2690 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 40,872 psi | 85% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,466 psi | 85% | 2697 fps | 96.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,234 psi | 86% | 2713 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 84% | 43,236 psi | 90% | 2615 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 88% | 41,060 psi | 86% | 2635 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,134 psi | 90% | 2635 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,453 psi | 89% | 2641 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 41,075 psi | 86% | 2598 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,279 psi | 88% | 2687 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 41,945 psi | 88% | 2628 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,350 psi | 86% | 2526 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 41,858 psi | 87% | 2638 fps | 98.9% |
| Somchem S365 | <<locked>> | 98% | 41,756 psi | 87% | 2740 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 84% | 42,279 psi | 88% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 43,279 psi | 90% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 42,656 psi | 89% | 2621 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 43,105 psi | 90% | 2680 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 41,669 psi | 87% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,366 psi | 89% | 2687 fps | 97.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,202 psi | 78% | 2657 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 40,872 psi | 85% | 2612 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,379 psi | 86% | 2635 fps | 98.8% |
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% | 37,144 psi | 78% | 2510 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,099 psi | 73% | 2500 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 35,563 psi | 74% | 2572 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 34,838 psi | 73% | 2461 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 36,898 psi | 77% | 2621 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,142 psi | 71% | 2480 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,724 psi | 77% | 2539 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,347 psi | 76% | 2589 fps | 95.8% |
| Alliant Reloder-17 | 41.1 gr | 82% | 31,459 psi | 66% | 2490 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,038 psi | 65% | 2480 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,813 psi | 83% | 2605 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 33,431 psi | 70% | 2480 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 36,854 psi | 77% | 2536 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,227 psi | 65% | 2431 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,057 psi | 77% | 2585 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 55% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,668 psi | 83% | 2572 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 40,422 psi | 84% | 2618 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,535 psi | 76% | 2493 fps | 96.7% |
| IMR 4831 | <<locked>> | 90% | 34,476 psi | 72% | 2526 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 37,536 psi | 78% | 2572 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 80% | 39,639 psi | 83% | 2592 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 36,390 psi | 76% | 2500 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 40,669 psi | 85% | 2589 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 40,161 psi | 84% | 2566 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 40,248 psi | 84% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,114 psi | 75% | 2530 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 36,071 psi | 75% | 2572 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 35,520 psi | 74% | 2536 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,252 psi | 55% | 1558 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,159 psi | 80% | 2638 fps | 97.2% |
| ReloadSwiss RS 60 | 40.1 gr | 80% | 31,386 psi | 66% | 2503 fps | 98.2% |
| ReloadSwiss RS 62 | 45 gr | 90% | 35,360 psi | 74% | 2585 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,638 psi | 81% | 2651 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 38,072 psi | 80% | 2516 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 31,546 psi | 66% | 2425 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,669 psi | 85% | 2589 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,639 psi | 83% | 2592 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,390 psi | 76% | 2500 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,663 psi | 68% | 2474 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,523 psi | 83% | 2579 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,301 psi | 72% | 2392 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 32,605 psi | 68% | 2434 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 26,701 psi | 56% | 2359 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 37,202 psi | 78% | 2503 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,072 psi | 80% | 2513 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,879 psi | 65% | 2375 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 35,433 psi | 74% | 2520 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 36,535 psi | 76% | 2500 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 37,057 psi | 77% | 2575 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 32,924 psi | 69% | 2556 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,531 psi | 66% | 2398 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,696 psi | 81% | 2579 fps | 98.3% |
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 53 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 142gr | Lehigh Defense Controlled Chaos. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,743 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 53 of the 53 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 142.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 142gr | Lehigh Defense Controlled Chaos 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.