Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 160gr | North Fork FPS bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate 4350 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 3100ᴾ | <<locked>> | 100% | 42,192 psi | 88% | 2498 fps | 96.7% |
| Accurate 4064 | <<locked>> | 82% | 42,714 psi | 89% | 2497 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 41,481 psi | 87% | 2556 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 82% | 41,379 psi | 86% | 2424 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,118 psi | 86% | 2447 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,031 psi | 86% | 2520 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 40,741 psi | 85% | 2540 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,567 psi | 85% | 2525 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,524 psi | 87% | 2620 fps | 98% |
| Bofors RP3 | <<locked>> | 82% | 40,915 psi | 85% | 2453 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 82% | 41,887 psi | 88% | 2461 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,989 psi | 90% | 2511 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 42,627 psi | 89% | 2556 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 77% | 1605 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 43,221 psi | 90% | 2493 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 84% | 42,772 psi | 89% | 2418 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 40,611 psi | 85% | 2476 fps | 98.1% |
| Lovex S065 | <<locked>> | 88% | 42,975 psi | 90% | 2459 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 41,321 psi | 86% | 2502 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 82% | 43,207 psi | 90% | 2514 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 92% | 43,236 psi | 90% | 2548 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 76% | 1643 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,163 psi | 88% | 2443 fps | 96.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 40,654 psi | 85% | 2545 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,075 psi | 86% | 2527 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,060 psi | 86% | 2540 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 84% | 41,060 psi | 86% | 2451 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,975 psi | 90% | 2459 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 88% | 40,930 psi | 86% | 2484 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,206 psi | 88% | 2501 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 40,915 psi | 85% | 2342 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 41,916 psi | 88% | 2455 fps | 99.4% |
| Somchem S365 | <<locked>> | 94% | 42,192 psi | 88% | 2560 fps | 100% |
| Unknown powder | <<locked>> | 88% | 42,105 psi | 88% | 2507 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 90% | 42,946 psi | 90% | 2448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,351 psi | 88% | 2484 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 88% | 42,931 psi | 90% | 2529 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 98% | 41,321 psi | 86% | 2549 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,250 psi | 90% | 2487 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,998 psi | 75% | 2536 fps | 99.3% |
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 3100 | <<locked>> | 96% | 36,318 psi | 76% | 2392 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 40,219 psi | 84% | 2454 fps | 100% |
| Accurate 4350 | 39.1 gr | 80% | 29,385 psi | 61% | 2290 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 39,030 psi | 82% | 2379 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,740 psi | 81% | 2401 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 82% | 32,082 psi | 67% | 2313 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,272 psi | 70% | 2374 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,515 psi | 62% | 2278 fps | 96% |
| Alliant Reloder-26 | 48.4 gr | 92% | 33,837 psi | 71% | 2442 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 38,232 psi | 80% | 2403 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 39,204 psi | 82% | 2409 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,499 psi | 57% | 2167 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,900 psi | 83% | 2507 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 56% | 1432 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,363 psi | 80% | 2402 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 40,393 psi | 84% | 2372 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 31,662 psi | 66% | 2285 fps | 95.3% |
| Lovex S065 | <<locked>> | 82% | 35,694 psi | 75% | 2312 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 32,068 psi | 67% | 2303 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,509 psi | 85% | 2464 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 37,797 psi | 79% | 2438 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,832 psi | 56% | 1465 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,537 psi | 83% | 2393 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,418 psi | 74% | 2435 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,402 psi | 70% | 2364 fps | 95.5% |
| ReloadSwiss RS 70 | 44.8 gr | 86% | 35,911 psi | 75% | 2426 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 36,143 psi | 76% | 2353 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,694 psi | 75% | 2312 fps | 95.1% |
| Shooters World SW4350 | <<locked>> | 86% | 38,392 psi | 80% | 2434 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,028 psi | 77% | 2400 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,508 psi | 80% | 2299 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 37,014 psi | 77% | 2359 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 26,847 psi | 56% | 2205 fps | 96.6% |
| Unknown powder | <<locked>> | 82% | 34,751 psi | 73% | 2354 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 31,546 psi | 66% | 2222 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 80% | 32,445 psi | 68% | 2279 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 33,040 psi | 69% | 2321 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 29,718 psi | 62% | 2296 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,053 psi | 65% | 2231 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,789 psi | 58% | 2297 fps | 95.4% |
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 40 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 160gr | North Fork FPS. Alliant Reloder-26 delivers the highest muzzle velocity at 2,620 fps; across all powders the maximum-charge window runs from 1,605 fps to 2,620 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 75–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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. Alliant Reloder-26, Accurate 4350, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 160gr | North Fork FPS 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.