Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 160gr | Sierra SBT GameKing bullet and 43 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% | 42,409 psi | 89% | 2562 fps | 97.5% |
| Accurate 4064 | <<locked>> | 82% | 43,250 psi | 90% | 2510 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 42,250 psi | 88% | 2575 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 82% | 41,829 psi | 87% | 2484 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 41,858 psi | 87% | 2510 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 41,423 psi | 87% | 2582 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 86% | 41,423 psi | 87% | 2608 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,625 psi | 85% | 2595 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,322 psi | 88% | 2697 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 41,713 psi | 87% | 2516 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 42,366 psi | 89% | 2520 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 88% | 41,872 psi | 87% | 2566 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 40,872 psi | 85% | 2523 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 75% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 42,337 psi | 88% | 2513 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,278 psi | 86% | 2470 fps | 95.9% |
| IMR 4831 | <<locked>> | 92% | 43,221 psi | 90% | 2575 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 40,973 psi | 86% | 2470 fps | 97.4% |
| Lovex S070 | <<locked>> | 88% | 41,321 psi | 86% | 2497 fps | 96.4% |
| Norma MRP | <<locked>> | 98% | 42,467 psi | 89% | 2657 fps | 96.4% |
| Norma URP | <<locked>> | 90% | 42,061 psi | 88% | 2569 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 90% | 40,886 psi | 85% | 2556 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,187 psi | 76% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,830 psi | 89% | 2507 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 41,321 psi | 86% | 2608 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,742 psi | 87% | 2592 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,582 psi | 87% | 2608 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 84% | 41,843 psi | 87% | 2513 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,973 psi | 86% | 2470 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 88% | 41,321 psi | 86% | 2497 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,975 psi | 90% | 2566 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 41,408 psi | 87% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,105 psi | 90% | 2470 fps | 96.6% |
| Somchem S355 | <<locked>> | 84% | 42,409 psi | 89% | 2513 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 42,888 psi | 90% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 42,786 psi | 89% | 2562 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 86% | 43,062 psi | 90% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 41,205 psi | 86% | 2516 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 88% | 40,393 psi | 84% | 2520 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 98% | 41,843 psi | 87% | 2615 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 40,886 psi | 85% | 2493 fps | 99.7% |
| Winchester 760 | <<locked>> | 88% | 42,119 psi | 88% | 2572 fps | 96.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,419 psi | 76% | 2618 fps | 99.9% |
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>> | 94% | 34,751 psi | 73% | 2411 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 40,785 psi | 85% | 2467 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,849 psi | 62% | 2310 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 39,494 psi | 83% | 2438 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,233 psi | 82% | 2461 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,458 psi | 64% | 2323 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,895 psi | 71% | 2444 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,498 psi | 55% | 2244 fps | 95.3% |
| Alliant Reloder-26 | 47.9 gr | 90% | 31,995 psi | 67% | 2454 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 39,044 psi | 82% | 2467 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 39,653 psi | 83% | 2470 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 39,218 psi | 82% | 2513 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,847 psi | 58% | 2228 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 56% | 1460 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 40,001 psi | 84% | 2467 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,754 psi | 81% | 2418 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 29,240 psi | 61% | 2277 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 34,084 psi | 71% | 2326 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 38,798 psi | 81% | 2448 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 39,595 psi | 83% | 2595 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 30,400 psi | 64% | 2313 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 86% | 36,056 psi | 75% | 2454 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 56% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,929 psi | 83% | 2451 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,071 psi | 75% | 2503 fps | 100% |
| ReloadSwiss RS 62 | 42.6 gr | 82% | 31,894 psi | 67% | 2379 fps | 95.7% |
| ReloadSwiss RS 70 | 44.3 gr | 84% | 34,011 psi | 71% | 2434 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 36,637 psi | 77% | 2415 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,084 psi | 71% | 2326 fps | 95.3% |
| Shooters World SW4350 | <<locked>> | 86% | 38,798 psi | 81% | 2448 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,492 psi | 78% | 2461 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,015 psi | 82% | 2352 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,797 psi | 79% | 2369 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 37,492 psi | 78% | 2418 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 27,209 psi | 57% | 2267 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 40,089 psi | 84% | 2510 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 35,549 psi | 74% | 2356 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 31,633 psi | 66% | 2313 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 31,212 psi | 65% | 2316 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 86% | 28,369 psi | 59% | 2313 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,357 psi | 66% | 2290 fps | 97.8% |
| Winchester 760 | <<locked>> | 86% | 39,508 psi | 83% | 2520 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,368 psi | 55% | 2310 fps | 95.7% |
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 43 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 160gr | Sierra SBT GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,697 fps. Accurate 3100 gives the best case fill at 100 %, and 43 of the 43 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 | Sierra SBT GameKing 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.