Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 170gr | Norma VULKAN 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, ReloadSwiss RS 70 and Vihtavuori N555.
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% | 42,279 psi | 88% | 2487 fps | 98.1% |
| Accurate 4350 | <<locked>> | 88% | 41,945 psi | 88% | 2493 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 40,930 psi | 86% | 2500 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 40,727 psi | 85% | 2520 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,830 psi | 89% | 2562 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,666 psi | 79% | 2480 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,930 psi | 88% | 2618 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 41,568 psi | 87% | 2405 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 86% | 41,510 psi | 87% | 2487 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,308 psi | 90% | 2490 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,770 psi | 85% | 2503 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 75% | 1588 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,829 psi | 87% | 2434 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,207 psi | 90% | 2438 fps | 97.2% |
| IMR 4831 | <<locked>> | 90% | 42,917 psi | 90% | 2497 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 43,004 psi | 90% | 2441 fps | 98.4% |
| Lovex S070 | <<locked>> | 86% | 40,828 psi | 85% | 2418 fps | 97% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,666 psi | 79% | 2402 fps | 97% |
| Norma MRP | <<locked>> | 96% | 41,945 psi | 88% | 2579 fps | 97.1% |
| Norma URP | <<locked>> | 88% | 41,684 psi | 87% | 2487 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 43,192 psi | 90% | 2530 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 76% | 1624 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 40,611 psi | 85% | 2520 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,640 psi | 87% | 2516 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 40,915 psi | 85% | 2526 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 82% | 41,365 psi | 86% | 2431 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 41,568 psi | 87% | 2405 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,004 psi | 90% | 2441 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 86% | 40,828 psi | 85% | 2418 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,235 psi | 88% | 2477 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,395 psi | 89% | 2388 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 41,800 psi | 87% | 2428 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 42,714 psi | 89% | 2543 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,221 psi | 88% | 2480 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 84% | 42,438 psi | 89% | 2408 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 40,785 psi | 85% | 2438 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 98% | 41,553 psi | 87% | 2454 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 88% | 42,699 psi | 89% | 2487 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 96% | 41,858 psi | 87% | 2539 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,004 psi | 90% | 2461 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,510 psi | 87% | 2487 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,406 psi | 80% | 2598 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% | 32,401 psi | 68% | 2293 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 31,807 psi | 66% | 2287 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,010 psi | 67% | 2300 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,563 psi | 74% | 2411 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,671 psi | 52% | 2126 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,475 psi | 70% | 2379 fps | 95.9% |
| Alliant Reloder-26 | 45.8 gr | 86% | 29,733 psi | 62% | 2329 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 39,001 psi | 81% | 2356 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 82% | 36,448 psi | 76% | 2385 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,414 psi | 61% | 2205 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 84% | 38,043 psi | 79% | 2444 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 56% | 1414 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 39,247 psi | 82% | 2385 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,072 psi | 80% | 2336 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 30,806 psi | 64% | 2247 fps | 96.6% |
| Lovex S065 | <<locked>> | 80% | 35,607 psi | 74% | 2293 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 36,187 psi | 76% | 2326 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 33,083 psi | 69% | 2306 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 36,666 psi | 77% | 2464 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 32,155 psi | 67% | 2290 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 82% | 33,301 psi | 70% | 2323 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 57% | 1450 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,811 psi | 79% | 2464 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,502 psi | 66% | 2303 fps | 96.4% |
| ReloadSwiss RS 70 | 42.2 gr | 80% | 31,357 psi | 66% | 2303 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 38,725 psi | 81% | 2382 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 39,001 psi | 81% | 2356 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,607 psi | 74% | 2293 fps | 96.6% |
| Shooters World SW4350 | <<locked>> | 82% | 36,187 psi | 76% | 2326 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,581 psi | 83% | 2428 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,217 psi | 78% | 2290 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 39,175 psi | 82% | 2379 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 28,834 psi | 60% | 2251 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 37,101 psi | 78% | 2382 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 37,463 psi | 78% | 2323 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,446 psi | 70% | 2287 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 38,972 psi | 81% | 2405 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 33,025 psi | 69% | 2293 fps | 96.9% |
| Vihtavuori N555 | 39.8 gr | 82% | 26,469 psi | 55% | 2195 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,953 psi | 69% | 2264 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 36,448 psi | 76% | 2385 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,671 psi | 52% | 2198 fps | 95.6% |
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 | 170gr | Norma VULKAN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,618 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,618 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 170.0 gr projectile in 0.284" calls for a 1:12.0 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, ReloadSwiss RS 70, Vihtavuori N555 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 170gr | Norma VULKAN 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.