Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 145gr | Speer Hot-Cor bullet and 40 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 3100ᴾ | <<locked>> | 100% | 40,306 psi | 84% | 2651 fps | 96% |
| Accurate 4064 | <<locked>> | 82% | 41,379 psi | 86% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,656 psi | 89% | 2717 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 42,946 psi | 90% | 2635 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,453 psi | 89% | 2654 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,873 psi | 90% | 2667 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,192 psi | 88% | 2726 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,192 psi | 88% | 2756 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,580 psi | 81% | 2680 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,033 psi | 90% | 2838 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 42,395 psi | 89% | 2664 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 82% | 40,451 psi | 85% | 2615 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,495 psi | 87% | 2667 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 74% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,395 psi | 89% | 2618 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 40,944 psi | 86% | 2667 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 42,322 psi | 88% | 2621 fps | 99.7% |
| Lovex S065 | <<locked>> | 88% | 41,684 psi | 87% | 2612 fps | 96.7% |
| Norma 203B | <<locked>> | 82% | 42,221 psi | 88% | 2657 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 42,612 psi | 89% | 2713 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 82% | 41,959 psi | 88% | 2674 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 92% | 41,800 psi | 87% | 2700 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 75% | 1765 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,003 psi | 88% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,409 psi | 89% | 2736 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,453 psi | 89% | 2749 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 86% | 42,525 psi | 89% | 2661 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,684 psi | 87% | 2612 fps | 96.7% |
| Shooters World Precision | <<locked>> | 82% | 42,322 psi | 88% | 2621 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,799 psi | 85% | 2657 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,395 psi | 89% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 43,207 psi | 90% | 2664 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 40,741 psi | 85% | 2720 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 86% | 41,321 psi | 86% | 2595 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 90% | 41,858 psi | 87% | 2661 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 82% | 42,627 psi | 89% | 2612 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 41,133 psi | 86% | 2661 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,032 psi | 88% | 2753 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,814 psi | 87% | 2638 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,519 psi | 72% | 2680 fps | 98.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 37,463 psi | 78% | 2592 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 38,798 psi | 81% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,387 psi | 68% | 2493 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 37,898 psi | 79% | 2533 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,449 psi | 78% | 2552 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,248 psi | 84% | 2618 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,982 psi | 69% | 2510 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,343 psi | 68% | 2523 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,471 psi | 59% | 2411 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,954 psi | 73% | 2648 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 36,999 psi | 77% | 2556 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 80% | 38,000 psi | 79% | 2562 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,326 psi | 59% | 2356 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 55% | 1539 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,798 psi | 83% | 2566 fps | 98.3% |
| IMR 4831 | <<locked>> | 84% | 31,691 psi | 66% | 2457 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 39,740 psi | 83% | 2572 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 36,869 psi | 77% | 2510 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 39,639 psi | 83% | 2605 fps | 98.6% |
| Norma URP | <<locked>> | 84% | 33,025 psi | 69% | 2500 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,175 psi | 82% | 2618 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 39,059 psi | 82% | 2644 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 56% | 1578 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,418 psi | 72% | 2589 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,635 psi | 72% | 2569 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,130 psi | 78% | 2628 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 34,809 psi | 73% | 2500 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,869 psi | 77% | 2510 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 39,740 psi | 83% | 2572 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,781 psi | 75% | 2549 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,275 psi | 78% | 2451 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,795 psi | 75% | 2510 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 26,005 psi | 54% | 2343 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 33,910 psi | 71% | 2444 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 34,345 psi | 72% | 2497 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 40,074 psi | 84% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,910 psi | 71% | 2503 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 30,400 psi | 64% | 2487 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,124 psi | 63% | 2369 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,485 psi | 60% | 2484 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 40 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 145gr | Speer Hot-Cor. Alliant Reloder-26 delivers the highest muzzle velocity at 2,838 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,838 fps. Accurate 3100 gives the best case fill at 100 %, and 40 of the 40 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:13.0 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.