Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 150gr | Remington PSP Core-Lokt bullet and 45 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 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 3100ᴾ | <<locked>> | 100% | 40,306 psi | 84% | 2602 fps | 96.3% |
| Accurate 4064 | <<locked>> | 82% | 41,568 psi | 87% | 2569 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 43,018 psi | 90% | 2674 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 84% | 43,120 psi | 90% | 2589 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,743 psi | 89% | 2608 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,134 psi | 90% | 2625 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,409 psi | 89% | 2680 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,511 psi | 89% | 2710 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,957 psi | 81% | 2641 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,265 psi | 90% | 2795 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 42,728 psi | 89% | 2621 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 82% | 40,727 psi | 85% | 2572 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 90% | 42,960 psi | 90% | 2671 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,756 psi | 87% | 2621 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 74% | 1686 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,540 psi | 89% | 2569 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 41,234 psi | 86% | 2621 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 42,511 psi | 89% | 2575 fps | 99.8% |
| Lovex S065 | <<locked>> | 88% | 42,032 psi | 88% | 2572 fps | 97% |
| Lovex S070 | <<locked>> | 90% | 42,293 psi | 88% | 2595 fps | 95.9% |
| Norma 203B | <<locked>> | 82% | 42,453 psi | 89% | 2612 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 42,888 psi | 90% | 2667 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 82% | 42,134 psi | 88% | 2628 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 92% | 41,872 psi | 87% | 2654 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,100 psi | 75% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,278 psi | 86% | 2556 fps | 96% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,221 psi | 88% | 2713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,627 psi | 89% | 2690 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,627 psi | 89% | 2707 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 86% | 42,598 psi | 89% | 2612 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,032 psi | 88% | 2572 fps | 97% |
| Shooters World Precision | <<locked>> | 82% | 42,511 psi | 89% | 2575 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 90% | 42,293 psi | 88% | 2595 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,191 psi | 86% | 2618 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,569 psi | 89% | 2497 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 40,828 psi | 85% | 2569 fps | 99.3% |
| Somchem S365 | <<locked>> | 94% | 41,104 psi | 86% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,408 psi | 87% | 2549 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 42,076 psi | 88% | 2615 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 42,902 psi | 90% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 41,423 psi | 87% | 2618 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,525 psi | 89% | 2713 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,192 psi | 88% | 2598 fps | 99.6% |
| Winchester 760 | <<locked>> | 90% | 42,960 psi | 90% | 2671 fps | 96% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,795 psi | 73% | 2644 fps | 99.1% |
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>> | 98% | 37,652 psi | 79% | 2549 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 38,957 psi | 81% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,706 psi | 68% | 2454 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,000 psi | 79% | 2487 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,579 psi | 79% | 2510 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,466 psi | 85% | 2572 fps | 98.5% |
| Alliant Reloder-16 | 41.1 gr | 84% | 33,185 psi | 69% | 2467 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,561 psi | 68% | 2484 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,587 psi | 60% | 2375 fps | 95.5% |
| Alliant Reloder-26 | 50.8 gr | 94% | 35,201 psi | 74% | 2608 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 37,231 psi | 78% | 2513 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 80% | 38,203 psi | 80% | 2520 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 40,306 psi | 84% | 2615 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,660 psi | 60% | 2323 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 55% | 1506 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,900 psi | 83% | 2520 fps | 98.5% |
| IMR 4831 | <<locked>> | 84% | 31,720 psi | 66% | 2415 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 39,885 psi | 83% | 2526 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 37,101 psi | 78% | 2470 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 39,697 psi | 83% | 2543 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 39,827 psi | 83% | 2562 fps | 98.8% |
| Norma URP | <<locked>> | 84% | 33,054 psi | 69% | 2454 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,262 psi | 82% | 2572 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 36,999 psi | 77% | 2552 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 56% | 1545 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,537 psi | 81% | 2500 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,679 psi | 72% | 2549 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,460 psi | 68% | 2470 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,925 psi | 73% | 2530 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 35,201 psi | 74% | 2464 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,101 psi | 78% | 2470 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 39,885 psi | 83% | 2526 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 39,697 psi | 83% | 2543 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,998 psi | 75% | 2510 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,579 psi | 79% | 2408 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,911 psi | 75% | 2464 fps | 98.4% |
| Somchem S365 | 40 gr | 80% | 26,136 psi | 55% | 2306 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 80% | 34,287 psi | 72% | 2408 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 32,445 psi | 68% | 2408 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,306 psi | 84% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,997 psi | 71% | 2461 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 90% | 30,574 psi | 64% | 2448 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,371 psi | 63% | 2333 fps | 96.7% |
| Winchester 760 | <<locked>> | 88% | 40,306 psi | 84% | 2615 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,747 psi | 60% | 2454 fps | 96.1% |
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 45 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 150gr | Remington PSP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 2,795 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,795 fps. Accurate 3100 gives the best case fill at 100 %, and 45 of the 45 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, Alliant Reloder-16, Somchem S365 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 150gr | Remington PSP 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.