Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 165gr | Remington SP Core-Lokt bullet and 42 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Somchem S365.
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 3100 | <<locked>> | 98% | 41,843 psi | 87% | 2520 fps | 97.8% |
| Accurate 4350 | <<locked>> | 88% | 41,423 psi | 87% | 2526 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 43,294 psi | 90% | 2477 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,149 psi | 90% | 2585 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,250 psi | 90% | 2608 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,424 psi | 89% | 2595 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,333 psi | 78% | 2510 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,365 psi | 86% | 2648 fps | 99% |
| Bofors RP7 | <<locked>> | 84% | 41,278 psi | 86% | 2438 fps | 96% |
| Hodgdon H414 | <<locked>> | 86% | 41,060 psi | 86% | 2520 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,801 psi | 89% | 2523 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,868 psi | 75% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,408 psi | 87% | 2464 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,598 psi | 89% | 2464 fps | 96.8% |
| IMR 4831 | <<locked>> | 90% | 42,409 psi | 89% | 2530 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 42,438 psi | 89% | 2467 fps | 98.1% |
| Lovex S070 | <<locked>> | 88% | 43,076 psi | 90% | 2500 fps | 97.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,043 psi | 77% | 2428 fps | 96.6% |
| Norma MRP | <<locked>> | 96% | 41,510 psi | 87% | 2608 fps | 96.6% |
| Norma URP | <<locked>> | 88% | 41,220 psi | 86% | 2520 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 42,612 psi | 89% | 2559 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 76% | 1654 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,888 psi | 90% | 2602 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,017 psi | 86% | 2543 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,265 psi | 90% | 2612 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 82% | 40,770 psi | 85% | 2461 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 41,278 psi | 86% | 2438 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,438 psi | 89% | 2467 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 88% | 43,076 psi | 90% | 2500 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,814 psi | 87% | 2510 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,873 psi | 90% | 2382 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,713 psi | 87% | 2415 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 41,249 psi | 86% | 2457 fps | 99.8% |
| Somchem S365 | <<locked>> | 92% | 42,105 psi | 88% | 2572 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 41,901 psi | 88% | 2513 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 84% | 42,119 psi | 88% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,062 psi | 90% | 2516 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 42,192 psi | 88% | 2520 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 96% | 41,176 psi | 86% | 2569 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,482 psi | 89% | 2490 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,060 psi | 86% | 2520 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,927 psi | 79% | 2625 fps | 100% |
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>> | 92% | 34,185 psi | 71% | 2369 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 31,299 psi | 65% | 2313 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 80% | 40,886 psi | 85% | 2434 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,633 psi | 66% | 2326 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,230 psi | 74% | 2444 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,875 psi | 54% | 2198 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,011 psi | 69% | 2402 fps | 95.3% |
| Alliant Reloder-26 | 47.5 gr | 88% | 31,444 psi | 66% | 2415 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 38,725 psi | 81% | 2388 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 82% | 35,853 psi | 75% | 2411 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,037 psi | 61% | 2231 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 56% | 1440 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 38,914 psi | 81% | 2418 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,869 psi | 79% | 2372 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 30,560 psi | 64% | 2277 fps | 96.2% |
| Lovex S065 | <<locked>> | 80% | 35,375 psi | 74% | 2326 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 35,694 psi | 75% | 2352 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 32,605 psi | 68% | 2333 fps | 95% |
| Norma MRP | 49.2 gr | 94% | 38,740 psi | 81% | 2549 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 31,691 psi | 66% | 2316 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 84% | 35,114 psi | 73% | 2402 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 57% | 1476 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,463 psi | 78% | 2500 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,169 psi | 65% | 2333 fps | 96% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 33,083 psi | 69% | 2385 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,174 psi | 80% | 2411 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 38,725 psi | 81% | 2388 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,375 psi | 74% | 2326 fps | 96.2% |
| Shooters World SW4350 | <<locked>> | 82% | 35,694 psi | 75% | 2352 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,986 psi | 81% | 2457 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,451 psi | 85% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,695 psi | 77% | 2316 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 38,972 psi | 81% | 2415 fps | 99.6% |
| Somchem S365 | 39.9 gr | 80% | 28,384 psi | 59% | 2274 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 39,320 psi | 82% | 2464 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 36,956 psi | 77% | 2349 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,938 psi | 69% | 2313 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 32,518 psi | 68% | 2316 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 27,804 psi | 58% | 2267 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,619 psi | 68% | 2293 fps | 98.6% |
| Winchester 760 | <<locked>> | 82% | 36,071 psi | 75% | 2415 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,889 psi | 54% | 2274 fps | 96.2% |
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 42 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 165gr | Remington SP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 2,648 fps; across all powders the maximum-charge window runs from 1,614 fps to 2,648 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 42 of the 42 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 165.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, 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, Norma MRP, Somchem S365 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 165gr | Remington SP Core-Lokt 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.