Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 158gr | Sellier & Bellot XRG bullet and 47 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% | 40,277 psi | 84% | 2526 fps | 96.6% |
| Accurate 4064 | <<locked>> | 82% | 41,495 psi | 87% | 2487 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,743 psi | 89% | 2589 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 84% | 42,902 psi | 90% | 2503 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,511 psi | 89% | 2523 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,873 psi | 90% | 2536 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,308 psi | 88% | 2598 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,293 psi | 88% | 2625 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,537 psi | 81% | 2556 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,076 psi | 90% | 2710 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 42,366 psi | 89% | 2533 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 40,611 psi | 85% | 2490 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 90% | 42,772 psi | 89% | 2585 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 41,466 psi | 87% | 2536 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 74% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,467 psi | 89% | 2487 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,395 psi | 89% | 2490 fps | 95.8% |
| IMR 4831 | <<locked>> | 92% | 40,973 psi | 86% | 2539 fps | 98.4% |
| Lovex S062 | <<locked>> | 82% | 42,424 psi | 89% | 2490 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 41,771 psi | 87% | 2487 fps | 97.2% |
| Lovex S070 | <<locked>> | 90% | 42,134 psi | 88% | 2513 fps | 96.2% |
| Norma 203B | <<locked>> | 82% | 42,192 psi | 88% | 2526 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 42,917 psi | 90% | 2664 fps | 96% |
| Norma URP | <<locked>> | 92% | 42,598 psi | 89% | 2582 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 82% | 41,930 psi | 88% | 2546 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 41,829 psi | 87% | 2575 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 75% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,988 psi | 86% | 2470 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,177 psi | 88% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,337 psi | 88% | 2608 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,496 psi | 89% | 2625 fps | 98% |
| Rottweil R 903 | <<locked>> | 86% | 42,511 psi | 89% | 2530 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,771 psi | 87% | 2487 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 42,424 psi | 89% | 2490 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 42,134 psi | 88% | 2513 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 40,944 psi | 86% | 2533 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,438 psi | 89% | 2415 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 43,091 psi | 90% | 2530 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 40,669 psi | 85% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,321 psi | 86% | 2470 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 42,003 psi | 88% | 2533 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 42,772 psi | 89% | 2487 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 41,191 psi | 86% | 2536 fps | 98.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,090 psi | 88% | 2625 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,756 psi | 87% | 2510 fps | 99.7% |
| Winchester 760 | <<locked>> | 90% | 42,772 psi | 89% | 2585 fps | 96.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,447 psi | 72% | 2562 fps | 99.2% |
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% | 37,492 psi | 78% | 2474 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 38,798 psi | 81% | 2438 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,269 psi | 63% | 2323 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 37,797 psi | 79% | 2405 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,420 psi | 78% | 2428 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,379 psi | 84% | 2490 fps | 98.7% |
| Alliant Reloder-16 | 38.3 gr | 82% | 31,082 psi | 65% | 2339 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,271 psi | 67% | 2402 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,456 psi | 59% | 2303 fps | 95.8% |
| Alliant Reloder-26 | 47.4 gr | 92% | 32,532 psi | 68% | 2467 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 37,173 psi | 78% | 2434 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 38,000 psi | 79% | 2438 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 40,001 psi | 84% | 2530 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,701 psi | 56% | 2195 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 55% | 1450 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,682 psi | 83% | 2434 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,740 psi | 83% | 2438 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 31,589 psi | 66% | 2339 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 39,682 psi | 83% | 2441 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 34,795 psi | 73% | 2343 fps | 95.1% |
| Lovex S070 | <<locked>> | 88% | 39,508 psi | 83% | 2464 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 39,769 psi | 83% | 2480 fps | 99% |
| Norma MRP | <<locked>> | 98% | 40,161 psi | 84% | 2608 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 30,922 psi | 65% | 2329 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,189 psi | 82% | 2493 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 36,753 psi | 77% | 2470 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 56% | 1486 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,392 psi | 80% | 2418 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,330 psi | 72% | 2464 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,314 psi | 68% | 2392 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,722 psi | 73% | 2451 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,070 psi | 73% | 2385 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,795 psi | 73% | 2343 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 39,682 psi | 83% | 2441 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 39,508 psi | 83% | 2464 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,839 psi | 75% | 2428 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,521 psi | 78% | 2329 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,752 psi | 75% | 2385 fps | 98.6% |
| Somchem S365 | 38.2 gr | 80% | 26,063 psi | 54% | 2234 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 34,142 psi | 71% | 2329 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 32,227 psi | 67% | 2329 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 40,074 psi | 84% | 2438 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,778 psi | 66% | 2336 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 88% | 28,631 psi | 60% | 2326 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,182 psi | 63% | 2260 fps | 97% |
| Winchester 760 | <<locked>> | 88% | 40,248 psi | 84% | 2536 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,861 psi | 56% | 2323 fps | 95.2% |
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 47 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 158gr | Sellier & Bellot XRG. Alliant Reloder-26 delivers the highest muzzle velocity at 2,710 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,710 fps. Accurate 3100 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:10.5 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 | 158gr | Sellier & Bellot XRG 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.