Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 160gr | Winchester FailSafe bullet and 41 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 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 3100ᴾ | <<locked>> | 100% | 41,684 psi | 87% | 2543 fps | 97.3% |
| Accurate 4064 | <<locked>> | 82% | 42,902 psi | 90% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 41,684 psi | 87% | 2559 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 82% | 41,582 psi | 87% | 2474 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,292 psi | 86% | 2493 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 40,973 psi | 86% | 2566 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 86% | 40,930 psi | 86% | 2592 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,030 psi | 84% | 2579 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,713 psi | 87% | 2677 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 41,133 psi | 86% | 2503 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 41,843 psi | 87% | 2507 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 88% | 41,423 psi | 87% | 2552 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,931 psi | 90% | 2556 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 75% | 1627 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,799 psi | 85% | 2454 fps | 95.7% |
| IMR 4831 | <<locked>> | 92% | 42,496 psi | 89% | 2559 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 42,902 psi | 90% | 2503 fps | 97.7% |
| Lovex S070 | <<locked>> | 88% | 40,857 psi | 85% | 2484 fps | 96.2% |
| Norma MRP | <<locked>> | 98% | 41,901 psi | 88% | 2638 fps | 96.1% |
| Norma URP | <<locked>> | 90% | 41,539 psi | 87% | 2556 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 92% | 43,120 psi | 90% | 2595 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 75% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,308 psi | 88% | 2490 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 40,611 psi | 85% | 2592 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,278 psi | 86% | 2579 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,973 psi | 86% | 2589 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 84% | 41,307 psi | 86% | 2500 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,902 psi | 90% | 2503 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 88% | 40,857 psi | 85% | 2484 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,424 psi | 89% | 2552 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,133 psi | 86% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,612 psi | 89% | 2454 fps | 96.3% |
| Somchem S355 | <<locked>> | 84% | 41,843 psi | 87% | 2500 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 42,409 psi | 89% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 42,554 psi | 89% | 2480 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 40,683 psi | 85% | 2503 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 90% | 42,598 psi | 89% | 2556 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 98% | 41,075 psi | 86% | 2598 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,163 psi | 90% | 2530 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 41,423 psi | 87% | 2552 fps | 96.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,665 psi | 75% | 2592 fps | 99.7% |
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% | 36,521 psi | 76% | 2444 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 40,161 psi | 84% | 2454 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,544 psi | 62% | 2297 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,972 psi | 81% | 2421 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,682 psi | 81% | 2444 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,052 psi | 63% | 2306 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,460 psi | 70% | 2428 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,673 psi | 58% | 2274 fps | 95.8% |
| Alliant Reloder-26 | 47.4 gr | 90% | 31,691 psi | 66% | 2441 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 38,450 psi | 80% | 2451 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 39,175 psi | 82% | 2454 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 38,783 psi | 81% | 2500 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,644 psi | 58% | 2218 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 56% | 1450 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,551 psi | 81% | 2408 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 30,777 psi | 64% | 2310 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 33,634 psi | 70% | 2310 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 38,348 psi | 80% | 2431 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 39,015 psi | 82% | 2579 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 29,921 psi | 63% | 2297 fps | 95% |
| Ramshot Hunter | <<locked>> | 86% | 35,636 psi | 74% | 2438 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 57% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,450 psi | 82% | 2434 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,621 psi | 74% | 2487 fps | 100% |
| ReloadSwiss RS 62 | 42.1 gr | 82% | 31,430 psi | 66% | 2365 fps | 95.4% |
| ReloadSwiss RS 70 | 43.8 gr | 84% | 33,620 psi | 70% | 2421 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 36,085 psi | 75% | 2398 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,634 psi | 70% | 2310 fps | 95% |
| Shooters World SW4350 | <<locked>> | 86% | 38,348 psi | 80% | 2431 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,970 psi | 77% | 2444 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,450 psi | 80% | 2336 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,856 psi | 83% | 2405 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 36,927 psi | 77% | 2402 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 26,818 psi | 56% | 2251 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 35,070 psi | 73% | 2339 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 31,401 psi | 66% | 2303 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 30,763 psi | 64% | 2300 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 27,934 psi | 58% | 2297 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,995 psi | 65% | 2277 fps | 97.6% |
| Winchester 760 | <<locked>> | 86% | 38,783 psi | 81% | 2500 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,063 psi | 54% | 2293 fps | 95.2% |
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 41 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 160gr | Winchester FailSafe. Alliant Reloder-26 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,677 fps. Accurate 3100 gives the best case fill at 100 %, and 41 of the 41 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, ReloadSwiss RS 70, ReloadSwiss RS 62 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 160gr | Winchester FailSafe 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.