Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 151gr | Warner Tool Co. Flat Line bullet and 56 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 70.
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% | 42,641 psi | 89% | 2513 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 42,844 psi | 90% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 41,118 psi | 86% | 2598 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 86% | 42,250 psi | 88% | 2526 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,438 psi | 89% | 2654 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,640 psi | 87% | 2549 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,018 psi | 88% | 2559 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,292 psi | 86% | 2608 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,205 psi | 86% | 2638 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,012 psi | 73% | 2503 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,769 psi | 81% | 2644 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,047 psi | 90% | 2579 fps | 98.1% |
| Bofors RP3 | <<locked>> | 86% | 41,379 psi | 86% | 2556 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 42,409 psi | 89% | 2559 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,960 psi | 90% | 2598 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,598 psi | 89% | 2605 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,056 psi | 73% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,569 psi | 89% | 2539 fps | 99.2% |
| IMR 4064 | <<locked>> | 84% | 41,713 psi | 87% | 2510 fps | 98.4% |
| IMR 4831 | <<locked>> | 96% | 42,177 psi | 88% | 2598 fps | 98% |
| IMR 4895 | <<locked>> | 84% | 42,989 psi | 90% | 2589 fps | 99% |
| Lovex D073.6 | <<locked>> | 82% | 42,540 psi | 89% | 2549 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 41,539 psi | 87% | 2513 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 40,872 psi | 85% | 2503 fps | 96% |
| Norma 201 | <<locked>> | 82% | 43,047 psi | 90% | 2526 fps | 99.6% |
| Norma 202 | <<locked>> | 82% | 43,221 psi | 90% | 2536 fps | 100% |
| Norma 203B | <<locked>> | 84% | 41,336 psi | 86% | 2549 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 41,249 psi | 86% | 2595 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 84% | 40,872 psi | 85% | 2562 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 96% | 43,192 psi | 90% | 2631 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 74% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,902 psi | 90% | 2539 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,046 psi | 86% | 2605 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,017 psi | 86% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,727 psi | 85% | 2615 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,539 psi | 87% | 2631 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 41,017 psi | 86% | 2484 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 41,249 psi | 86% | 2546 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,872 psi | 85% | 2503 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,540 psi | 89% | 2549 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 41,539 psi | 87% | 2513 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,728 psi | 89% | 2605 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,235 psi | 88% | 2539 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,742 psi | 87% | 2441 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,279 psi | 88% | 2552 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 41,945 psi | 88% | 2651 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 42,598 psi | 89% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 40,872 psi | 85% | 2474 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 42,960 psi | 90% | 2536 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 40,727 psi | 85% | 2546 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 42,061 psi | 88% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,511 psi | 89% | 2598 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,420 psi | 78% | 2575 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,118 psi | 86% | 2530 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,241 psi | 65% | 2480 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,553 psi | 87% | 2546 fps | 99.1% |
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% | 37,391 psi | 78% | 2425 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,346 psi | 74% | 2415 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,301 psi | 70% | 2434 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 35,041 psi | 73% | 2379 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,231 psi | 78% | 2543 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,403 psi | 72% | 2402 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,014 psi | 77% | 2461 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,374 psi | 72% | 2451 fps | 95.5% |
| Alliant Reloder-17 | 38.4 gr | 80% | 29,689 psi | 62% | 2359 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,399 psi | 61% | 2356 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,143 psi | 76% | 2582 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,190 psi | 84% | 2523 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 33,794 psi | 71% | 2402 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 80% | 34,824 psi | 73% | 2402 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,385 psi | 61% | 2300 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,318 psi | 78% | 2503 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 54% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,987 psi | 84% | 2490 fps | 98.8% |
| IMR 4064 | <<locked>> | 80% | 36,753 psi | 77% | 2411 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 32,634 psi | 68% | 2398 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,898 psi | 79% | 2487 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 39,885 psi | 83% | 2503 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 36,579 psi | 76% | 2418 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 38,435 psi | 80% | 2454 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 40,408 psi | 84% | 2480 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 40,524 psi | 85% | 2490 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,434 psi | 76% | 2451 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 34,098 psi | 71% | 2441 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,810 psi | 75% | 2457 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 94% | 40,611 psi | 85% | 2582 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,469 psi | 55% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,379 psi | 84% | 2490 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,377 psi | 80% | 2552 fps | 97.6% |
| ReloadSwiss RS 60 | 38.4 gr | 80% | 31,618 psi | 66% | 2428 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,650 psi | 74% | 2507 fps | 95.7% |
| ReloadSwiss RS 70 | 44.8 gr | 92% | 38,812 psi | 81% | 2572 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 38,508 psi | 80% | 2434 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 31,807 psi | 66% | 2349 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,435 psi | 80% | 2454 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,885 psi | 83% | 2503 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,579 psi | 76% | 2418 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,866 psi | 69% | 2395 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,726 psi | 83% | 2493 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,621 psi | 72% | 2313 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 32,837 psi | 69% | 2359 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 26,876 psi | 56% | 2290 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 37,594 psi | 79% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,377 psi | 80% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,140 psi | 65% | 2297 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 33,475 psi | 70% | 2392 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 36,898 psi | 77% | 2418 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 34,969 psi | 73% | 2444 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 94% | 30,908 psi | 65% | 2421 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,762 psi | 62% | 2274 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,428 psi | 61% | 2421 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,001 psi | 81% | 2497 fps | 98.7% |
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 56 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 151gr | Warner Tool Co. Flat Line. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,654 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,654 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 151.0 gr projectile in 0.284" calls for a 1:8.5 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 151gr | Warner Tool Co. Flat Line 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.