Load Specifications
Load data in caliber .400 Legend with .400 | 170gr | Fiocchi FMJTC bullet and 6 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Lovex S040 and Vihtavuori N110.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | <<locked>> | 94% | 39,247 psi | 87% | 2530 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,003 psi | 51% | 1476 fps | 100% |
| Lovex S040 | <<locked>> | 90% | 39,929 psi | 89% | 2359 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,915 psi | 49% | 1506 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 28,210 psi | 63% | 2146 fps | 97.8% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 35,404 psi | 79% | 2352 fps | 98.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | 29.6 gr | 80% | 24,540 psi | 55% | 2192 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 16,665 psi | 37% | 1316 fps | 100% |
| Lovex S040 | 25.4 gr | 80% | 29,805 psi | 66% | 2152 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,027 psi | 36% | 1345 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 22,031 psi | 49% | 1972 fps | 95% |
| Vihtavuori N110 | 27.5 gr | 90% | 26,629 psi | 59% | 2156 fps | 95.4% |
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 6 powders for .400 Legend loaded with the .400 | 170gr | Fiocchi FMJTC. Hodgdon LilGun delivers the highest muzzle velocity at 2,530 fps; across all powders the maximum-charge window runs from 1,476 fps to 2,530 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 6 of the 6 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 49–89 %, leaving at least 11 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. Hodgdon LilGun, Lovex S040, Vihtavuori N110 rank at the top here: for .400 Legend with the .400 | 170gr | Fiocchi FMJTC 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.