Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 150gr | Swift Scirocco bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, 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>> | 82% | 41,321 psi | 86% | 2513 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,814 psi | 87% | 2559 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 43,018 psi | 90% | 2654 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 41,046 psi | 86% | 2526 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,031 psi | 86% | 2651 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 43,004 psi | 90% | 2595 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,872 psi | 85% | 2559 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,612 psi | 89% | 2661 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,743 psi | 89% | 2694 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,434 psi | 76% | 2562 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,306 psi | 84% | 2707 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 42,772 psi | 89% | 2602 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 41,089 psi | 86% | 2556 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,640 psi | 87% | 2598 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,350 psi | 86% | 2605 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 74% | 1660 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 43,120 psi | 90% | 2559 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 41,249 psi | 86% | 2605 fps | 98% |
| IMR 4895 | <<locked>> | 82% | 41,858 psi | 87% | 2589 fps | 99% |
| Lovex S062 | <<locked>> | 84% | 42,685 psi | 89% | 2556 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 42,018 psi | 88% | 2549 fps | 96.6% |
| Norma 203B | <<locked>> | 84% | 42,714 psi | 89% | 2598 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 42,946 psi | 90% | 2651 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 84% | 42,351 psi | 88% | 2615 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 41,989 psi | 88% | 2635 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 74% | 1699 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,598 psi | 89% | 2657 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,656 psi | 89% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,554 psi | 89% | 2671 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,047 psi | 90% | 2687 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 42,235 psi | 88% | 2530 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 88% | 42,960 psi | 90% | 2598 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,018 psi | 88% | 2549 fps | 96.6% |
| Shooters World Precision | <<locked>> | 84% | 42,685 psi | 89% | 2556 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,307 psi | 86% | 2598 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 43,192 psi | 90% | 2487 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 41,075 psi | 86% | 2552 fps | 99.1% |
| Somchem S365 | <<locked>> | 96% | 40,959 psi | 86% | 2654 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 41,640 psi | 87% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,351 psi | 88% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,843 psi | 87% | 2539 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 42,134 psi | 88% | 2595 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 40,582 psi | 85% | 2510 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 41,510 psi | 87% | 2602 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,276 psi | 82% | 2635 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,598 psi | 89% | 2582 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,561 psi | 68% | 2549 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 43,134 psi | 90% | 2595 fps | 99.4% |
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% | 38,812 psi | 81% | 2467 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,724 psi | 77% | 2461 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,663 psi | 68% | 2438 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,143 psi | 76% | 2425 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,392 psi | 80% | 2592 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,549 psi | 74% | 2448 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,203 psi | 80% | 2507 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,388 psi | 70% | 2451 fps | 95.4% |
| Alliant Reloder-17 | 39.9 gr | 80% | 30,690 psi | 64% | 2411 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,414 psi | 64% | 2408 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,027 psi | 73% | 2579 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 34,969 psi | 73% | 2448 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 80% | 35,897 psi | 75% | 2448 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,645 psi | 60% | 2300 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,653 psi | 81% | 2552 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 55% | 1483 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,927 psi | 79% | 2457 fps | 97.7% |
| IMR 4831 | <<locked>> | 88% | 33,982 psi | 71% | 2451 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 39,117 psi | 82% | 2536 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,797 psi | 79% | 2464 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 37,362 psi | 78% | 2454 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 37,594 psi | 79% | 2493 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 33,141 psi | 69% | 2441 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 37,043 psi | 77% | 2507 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 39,639 psi | 83% | 2585 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,629 psi | 56% | 1522 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,943 psi | 83% | 2605 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,677 psi | 68% | 2477 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,722 psi | 73% | 2507 fps | 95.6% |
| ReloadSwiss RS 70 | 45.6 gr | 90% | 37,753 psi | 79% | 2572 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 39,740 psi | 83% | 2480 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,953 psi | 69% | 2395 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,362 psi | 78% | 2454 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 37,797 psi | 79% | 2464 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,026 psi | 71% | 2444 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,853 psi | 75% | 2356 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,968 psi | 71% | 2402 fps | 97.6% |
| Somchem S365 | 38.8 gr | 82% | 26,252 psi | 55% | 2290 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 39,044 psi | 82% | 2467 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,537 psi | 83% | 2470 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,227 psi | 67% | 2343 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 34,838 psi | 73% | 2444 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,985 psi | 79% | 2461 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,200 psi | 71% | 2448 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 30,458 psi | 64% | 2428 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,689 psi | 60% | 2267 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,645 psi | 60% | 2421 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,335 psi | 84% | 2543 fps | 99% |
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 48 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 150gr | Swift Scirocco. Alliant Reloder-26 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,707 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 48 of the 48 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 1:9.5 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. Somchem S365, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 150gr | Swift Scirocco 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.