Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 174gr | Prvi Partizan FMJ BT bullet and 48 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 Norma MRP.
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% | 43,004 psi | 90% | 2470 fps | 98.4% |
| Accurate 4350 | <<locked>> | 88% | 42,540 psi | 89% | 2474 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 41,597 psi | 87% | 2484 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 41,249 psi | 86% | 2500 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,192 psi | 90% | 2539 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 41,017 psi | 86% | 2500 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,232 psi | 80% | 2467 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 96% | 42,627 psi | 89% | 2602 fps | 99.5% |
| Bofors RP15ᴾ | <<locked>> | 100% | 42,540 psi | 89% | 2526 fps | 95.8% |
| Bofors RP5 | <<locked>> | 98% | 43,192 psi | 90% | 2539 fps | 96.2% |
| Bofors RP7 | <<locked>> | 84% | 42,221 psi | 88% | 2388 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 86% | 42,018 psi | 88% | 2467 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 84% | 42,859 psi | 90% | 2434 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 41,046 psi | 86% | 2421 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 41,307 psi | 86% | 2484 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 75% | 1568 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,540 psi | 89% | 2418 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,176 psi | 86% | 2372 fps | 96.9% |
| IMR 4831 | <<locked>> | 88% | 40,712 psi | 85% | 2428 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 40,785 psi | 85% | 2369 fps | 98.2% |
| Lovex S070 | <<locked>> | 86% | 41,524 psi | 87% | 2402 fps | 97.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,261 psi | 80% | 2385 fps | 97.4% |
| Norma MRP | <<locked>> | 96% | 42,612 psi | 89% | 2562 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 42,206 psi | 88% | 2467 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 41,075 psi | 86% | 2461 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 76% | 1604 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 41,118 psi | 86% | 2497 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 42,250 psi | 88% | 2497 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,423 psi | 87% | 2507 fps | 99% |
| Rottweil R 903 | <<locked>> | 82% | 41,814 psi | 87% | 2405 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 42,308 psi | 88% | 2480 fps | 96% |
| Rottweil R 907 | <<locked>> | 84% | 42,221 psi | 88% | 2388 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,785 psi | 85% | 2369 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 86% | 41,524 psi | 87% | 2402 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,960 psi | 90% | 2461 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,815 psi | 89% | 2369 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,901 psi | 88% | 2477 fps | 95.8% |
| Somchem S355 | <<locked>> | 82% | 42,482 psi | 89% | 2408 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 40,495 psi | 85% | 2474 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,888 psi | 90% | 2464 fps | 97% |
| Vihtavuori N150 | <<locked>> | 84% | 43,149 psi | 90% | 2388 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 41,278 psi | 86% | 2415 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 98% | 42,163 psi | 88% | 2438 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 88% | 43,250 psi | 90% | 2467 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 96% | 42,554 psi | 89% | 2520 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 40,654 psi | 85% | 2392 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,322 psi | 88% | 2474 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,015 psi | 82% | 2582 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>> | 90% | 32,924 psi | 69% | 2277 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 32,445 psi | 68% | 2274 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,329 psi | 68% | 2283 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,158 psi | 76% | 2398 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 40,480 psi | 85% | 2487 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,106 psi | 52% | 2116 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 31,879 psi | 67% | 2313 fps | 95.5% |
| Alliant Reloder-26 | 45.5 gr | 86% | 30,182 psi | 63% | 2320 fps | 95.9% |
| Bofors RP15 | <<locked>> | 98% | 39,929 psi | 83% | 2474 fps | 95% |
| Bofors RP5 | <<locked>> | 96% | 40,480 psi | 85% | 2487 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 37,115 psi | 78% | 2290 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 34,505 psi | 72% | 2316 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 40,176 psi | 84% | 2385 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,907 psi | 62% | 2192 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 84% | 38,522 psi | 80% | 2428 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 56% | 1398 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 37,449 psi | 78% | 2323 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,609 psi | 81% | 2320 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 31,372 psi | 66% | 2234 fps | 97.1% |
| Lovex S065 | <<locked>> | 80% | 36,143 psi | 76% | 2277 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 34,287 psi | 72% | 2254 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 31,604 psi | 66% | 2247 fps | 95.2% |
| Norma MRP | 47.2 gr | 92% | 37,188 psi | 78% | 2451 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 32,489 psi | 68% | 2270 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 82% | 33,910 psi | 71% | 2310 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 57% | 1430 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,479 psi | 80% | 2448 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,923 psi | 67% | 2287 fps | 96.9% |
| ReloadSwiss RS 70 | 41.9 gr | 80% | 31,705 psi | 66% | 2287 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,102 psi | 82% | 2359 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 39,610 psi | 83% | 2428 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 37,115 psi | 78% | 2290 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,143 psi | 76% | 2277 fps | 97% |
| Shooters World SW4350 | <<locked>> | 80% | 34,287 psi | 72% | 2254 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,987 psi | 84% | 2405 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,201 psi | 74% | 2224 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 39,247 psi | 82% | 2425 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 39,784 psi | 83% | 2362 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 29,167 psi | 61% | 2231 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 37,855 psi | 79% | 2369 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 37,840 psi | 79% | 2300 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,040 psi | 71% | 2274 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 96% | 39,508 psi | 83% | 2388 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 33,388 psi | 70% | 2274 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 27,021 psi | 56% | 2185 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,475 psi | 70% | 2251 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 34,505 psi | 72% | 2316 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 23,482 psi | 49% | 2129 fps | 95% |
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 48 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 174gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,602 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 48 of the 48 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 174.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, 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, Norma MRP rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 174gr | Prvi Partizan FMJ BT 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.