Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 120gr | Barnes X S bullet and 39 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 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>> | 82% | 41,887 psi | 88% | 2812 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,814 psi | 87% | 2848 fps | 99.9% |
| Accurate 4350 | <<locked>> | 94% | 41,930 psi | 88% | 2917 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 42,612 psi | 89% | 2841 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,888 psi | 90% | 2972 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,264 psi | 88% | 2871 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,801 psi | 89% | 2884 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,626 psi | 87% | 2949 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,134 psi | 90% | 2887 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 42,351 psi | 88% | 2884 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 43,236 psi | 90% | 2910 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 43,047 psi | 90% | 2930 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 74% | 1890 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,873 psi | 90% | 2858 fps | 97.9% |
| IMR 4064 | <<locked>> | 84% | 42,221 psi | 88% | 2825 fps | 96.8% |
| IMR 4831 | <<locked>> | 96% | 42,757 psi | 89% | 2917 fps | 96.3% |
| IMR 4895 | <<locked>> | 82% | 41,031 psi | 86% | 2861 fps | 97.1% |
| Lovex S062 | <<locked>> | 84% | 42,351 psi | 88% | 2838 fps | 98.5% |
| Norma 203B | <<locked>> | 84% | 42,134 psi | 88% | 2874 fps | 97.4% |
| Norma URP | <<locked>> | 94% | 41,930 psi | 88% | 2910 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 84% | 41,423 psi | 87% | 2877 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,824 psi | 75% | 1932 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,452 psi | 87% | 2927 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,510 psi | 87% | 2963 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 41,959 psi | 88% | 2805 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 88% | 42,206 psi | 88% | 2871 fps | 98% |
| Shooters World Precision | <<locked>> | 84% | 42,351 psi | 88% | 2838 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 43,004 psi | 90% | 2920 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,830 psi | 89% | 2861 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,235 psi | 88% | 2762 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,902 psi | 90% | 2874 fps | 98% |
| Somchem S365 | <<locked>> | 98% | 42,540 psi | 89% | 2969 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 84% | 43,294 psi | 90% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,510 psi | 87% | 2795 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 88% | 40,973 psi | 86% | 2805 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 84% | 42,612 psi | 89% | 2835 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 94% | 43,236 psi | 90% | 2917 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,698 psi | 87% | 2831 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,076 psi | 88% | 2864 fps | 97.9% |
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% | 39,450 psi | 82% | 2766 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,246 psi | 78% | 2746 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 39,421 psi | 82% | 2861 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 82% | 37,942 psi | 79% | 2736 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,292 psi | 84% | 2910 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,244 psi | 74% | 2707 fps | 96.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,840 psi | 79% | 2769 fps | 95.5% |
| Alliant Reloder-17 | 45.4 gr | 84% | 34,708 psi | 73% | 2769 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,524 psi | 85% | 2831 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 34,983 psi | 73% | 2713 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,229 psi | 72% | 2697 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,869 psi | 79% | 2812 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 55% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,422 psi | 84% | 2802 fps | 97.4% |
| IMR 4064 | <<locked>> | 80% | 37,507 psi | 78% | 2717 fps | 95.4% |
| IMR 4831 | <<locked>> | 94% | 40,234 psi | 84% | 2861 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 38,682 psi | 81% | 2805 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 37,681 psi | 79% | 2733 fps | 97.5% |
| Norma 203B | <<locked>> | 80% | 37,260 psi | 78% | 2759 fps | 95.9% |
| Norma URP | <<locked>> | 92% | 39,523 psi | 83% | 2854 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,492 psi | 76% | 2762 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,890 psi | 56% | 1732 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,798 psi | 81% | 2864 fps | 95.7% |
| ReloadSwiss RS 60 | 43.2 gr | 80% | 32,474 psi | 68% | 2720 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,595 psi | 83% | 2753 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 33,257 psi | 69% | 2657 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 37,681 psi | 79% | 2733 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,810 psi | 75% | 2749 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,161 psi | 84% | 2802 fps | 96.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,476 psi | 74% | 2618 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 34,011 psi | 71% | 2664 fps | 95.4% |
| Somchem S365 | 45.1 gr | 88% | 31,662 psi | 66% | 2694 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 38,566 psi | 81% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,131 psi | 82% | 2746 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 32,314 psi | 68% | 2598 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 80% | 37,724 psi | 79% | 2733 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 40,596 psi | 85% | 2858 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,795 psi | 73% | 2667 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,436 psi | 82% | 2805 fps | 97.2% |
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 39 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 120gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,890 fps to 2,972 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 39 of the 39 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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 60, Alliant Reloder-17, Somchem S365 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 120gr | Barnes X S 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.