Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 160gr | Speer TBBC bullet and 44 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 and ReloadSwiss RS 70.
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% | 40,683 psi | 85% | 2520 fps | 96.9% |
| Accurate 4064 | <<locked>> | 82% | 41,887 psi | 88% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 40,509 psi | 85% | 2533 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 40,727 psi | 85% | 2451 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 43,163 psi | 90% | 2523 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,627 psi | 89% | 2592 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,656 psi | 89% | 2618 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,131 psi | 82% | 2552 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,611 psi | 85% | 2648 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 43,004 psi | 90% | 2530 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 40,915 psi | 85% | 2484 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,134 psi | 88% | 2533 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 74% | 1617 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,757 psi | 89% | 2480 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,670 psi | 89% | 2484 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 41,626 psi | 87% | 2536 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 42,728 psi | 89% | 2480 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 42,351 psi | 88% | 2484 fps | 97.5% |
| Lovex S070 | <<locked>> | 90% | 42,772 psi | 89% | 2513 fps | 96.5% |
| Norma 203B | <<locked>> | 82% | 42,844 psi | 90% | 2523 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 43,279 psi | 90% | 2579 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 42,540 psi | 89% | 2543 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 42,163 psi | 88% | 2569 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 75% | 1657 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,524 psi | 87% | 2467 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,511 psi | 89% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 43,076 psi | 90% | 2605 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,091 psi | 90% | 2625 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 86% | 43,207 psi | 90% | 2526 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,351 psi | 88% | 2484 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 42,728 psi | 89% | 2480 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 42,772 psi | 89% | 2513 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,539 psi | 87% | 2530 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,047 psi | 90% | 2408 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,829 psi | 87% | 2431 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 41,191 psi | 86% | 2480 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 41,321 psi | 86% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,974 psi | 88% | 2464 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 42,366 psi | 89% | 2526 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 43,076 psi | 90% | 2474 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 41,858 psi | 87% | 2536 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,844 psi | 90% | 2625 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,308 psi | 88% | 2507 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,954 psi | 73% | 2562 fps | 99.5% |
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>> | 96% | 35,549 psi | 74% | 2418 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 39,378 psi | 82% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,821 psi | 64% | 2323 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 38,348 psi | 80% | 2402 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,985 psi | 79% | 2425 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,560 psi | 66% | 2339 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,735 psi | 68% | 2402 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,267 psi | 57% | 2254 fps | 95.4% |
| Alliant Reloder-26 | 47.5 gr | 92% | 33,040 psi | 69% | 2467 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 37,507 psi | 78% | 2428 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,551 psi | 81% | 2434 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,108 psi | 57% | 2195 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 55% | 1440 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,277 psi | 84% | 2434 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,277 psi | 84% | 2434 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 29,979 psi | 63% | 2287 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 40,248 psi | 84% | 2438 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 35,056 psi | 73% | 2336 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 37,797 psi | 79% | 2415 fps | 95% |
| Norma 203B | <<locked>> | 80% | 40,074 psi | 84% | 2470 fps | 99.2% |
| Norma URP | <<locked>> | 82% | 31,459 psi | 66% | 2329 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,566 psi | 83% | 2484 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 37,043 psi | 77% | 2464 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 56% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,899 psi | 81% | 2418 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,824 psi | 73% | 2461 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,734 psi | 64% | 2339 fps | 95% |
| ReloadSwiss RS 70 | 44 gr | 86% | 35,230 psi | 74% | 2451 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 35,389 psi | 74% | 2379 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,056 psi | 73% | 2336 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 40,248 psi | 84% | 2438 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 37,797 psi | 79% | 2415 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,376 psi | 76% | 2425 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,782 psi | 79% | 2320 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,073 psi | 82% | 2382 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 36,289 psi | 76% | 2382 fps | 98.8% |
| Somchem S365 | 38.2 gr | 80% | 26,295 psi | 55% | 2231 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,461 psi | 72% | 2323 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 30,618 psi | 64% | 2277 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 40,611 psi | 85% | 2434 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,082 psi | 67% | 2329 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 28,921 psi | 60% | 2320 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,603 psi | 64% | 2260 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,079 psi | 57% | 2320 fps | 95.8% |
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 44 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 160gr | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,648 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,648 fps. Accurate 3100 gives the best case fill at 100 %, and 44 of the 44 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 160.0 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, 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 160gr | Speer TBBC 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.