Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 150gr | Barnes TSX BT bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 62, 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 2495 | <<locked>> | 84% | 42,946 psi | 90% | 2552 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 43,134 psi | 90% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,163 psi | 88% | 2651 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 86% | 42,931 psi | 90% | 2575 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,567 psi | 85% | 2654 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,192 psi | 88% | 2592 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,873 psi | 90% | 2612 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,076 psi | 88% | 2664 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,163 psi | 88% | 2694 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,723 psi | 75% | 2556 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,711 psi | 83% | 2703 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 42,018 psi | 88% | 2602 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 86% | 43,062 psi | 90% | 2605 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,046 psi | 86% | 2598 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,872 psi | 85% | 2605 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,085 psi | 73% | 1667 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,409 psi | 89% | 2559 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 43,163 psi | 90% | 2651 fps | 98.4% |
| IMR 4895 | <<locked>> | 82% | 41,046 psi | 86% | 2585 fps | 98.9% |
| Lovex S062 | <<locked>> | 84% | 42,119 psi | 88% | 2559 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 41,394 psi | 86% | 2549 fps | 96.5% |
| Norma 201 | <<locked>> | 82% | 43,308 psi | 90% | 2569 fps | 99.8% |
| Norma 203B | <<locked>> | 84% | 42,192 psi | 88% | 2598 fps | 99% |
| Norma URP | <<locked>> | 94% | 42,337 psi | 88% | 2648 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 84% | 41,800 psi | 87% | 2615 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 41,336 psi | 86% | 2631 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 74% | 1703 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,076 psi | 88% | 2657 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,090 psi | 88% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,814 psi | 87% | 2667 fps | 97.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,395 psi | 89% | 2687 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 82% | 41,321 psi | 86% | 2526 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 88% | 41,930 psi | 88% | 2592 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,394 psi | 86% | 2549 fps | 96.5% |
| Shooters World Precision | <<locked>> | 84% | 42,119 psi | 88% | 2559 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,828 psi | 85% | 2602 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,120 psi | 90% | 2592 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,482 psi | 89% | 2487 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,975 psi | 90% | 2598 fps | 99.4% |
| Somchem S365 | <<locked>> | 98% | 42,873 psi | 90% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 40,785 psi | 85% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,611 psi | 87% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 40,959 psi | 86% | 2533 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 41,568 psi | 87% | 2595 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 42,525 psi | 89% | 2556 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,872 psi | 85% | 2598 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,450 psi | 80% | 2628 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,959 psi | 88% | 2582 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,734 psi | 66% | 2536 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,308 psi | 88% | 2592 fps | 99.4% |
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 2495 | <<locked>> | 80% | 37,492 psi | 78% | 2457 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,462 psi | 74% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 31,589 psi | 66% | 2425 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 35,520 psi | 74% | 2425 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,681 psi | 79% | 2589 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,809 psi | 73% | 2444 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,405 psi | 78% | 2500 fps | 97.6% |
| Alliant Reloder-16 | 40.2 gr | 86% | 32,663 psi | 68% | 2444 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,907 psi | 62% | 2402 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,689 psi | 62% | 2398 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 34,389 psi | 72% | 2575 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 34,243 psi | 72% | 2444 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 80% | 35,244 psi | 74% | 2448 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,862 psi | 58% | 2293 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,145 psi | 80% | 2552 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 55% | 1490 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,217 psi | 78% | 2454 fps | 97.6% |
| IMR 4831 | <<locked>> | 88% | 33,083 psi | 69% | 2444 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,319 psi | 80% | 2530 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 36,970 psi | 77% | 2457 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 36,463 psi | 76% | 2448 fps | 95% |
| Norma 201 | <<locked>> | 80% | 40,741 psi | 85% | 2520 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 36,796 psi | 77% | 2490 fps | 98% |
| Norma URP | <<locked>> | 86% | 32,576 psi | 68% | 2438 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,245 psi | 76% | 2500 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 38,711 psi | 81% | 2579 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,252 psi | 55% | 1522 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,146 psi | 82% | 2602 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 31,908 psi | 67% | 2470 fps | 99% |
| ReloadSwiss RS 62 | 44.3 gr | 88% | 33,982 psi | 71% | 2500 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,115 psi | 78% | 2572 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 38,841 psi | 81% | 2477 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,010 psi | 67% | 2385 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 36,463 psi | 76% | 2448 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 36,970 psi | 77% | 2457 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,301 psi | 70% | 2438 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,335 psi | 84% | 2539 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,940 psi | 73% | 2349 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,112 psi | 69% | 2395 fps | 97.4% |
| Somchem S365 | 39.2 gr | 82% | 25,411 psi | 53% | 2277 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 37,971 psi | 79% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,841 psi | 81% | 2470 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,401 psi | 66% | 2336 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 34,011 psi | 71% | 2438 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,434 psi | 78% | 2461 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 33,286 psi | 70% | 2438 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 31,560 psi | 66% | 2470 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,094 psi | 59% | 2264 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,718 psi | 62% | 2474 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,552 psi | 83% | 2539 fps | 99% |
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 50 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 150gr | Barnes TSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,703 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. ReloadSwiss RS 62, Alliant Reloder-16, Somchem S365 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 150gr | Barnes TSX 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.