Load Specifications
Load data in caliber .401 Win. SL with .410 | 400gr | Barnes Banded Solid bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Lovex S053, SNPE Vectan BA6 1/2 and ReloadSwiss RS 14.
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 |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 82% | 32,111 psi | 90% | 1191 fps | 98.3% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 30,893 psi | 87% | 1286 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,991 psi | 73% | 787 fps | 100% |
| Lovex S053 | <<locked>> | 92% | 31,488 psi | 89% | 1243 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,961 psi | 70% | 804 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 31,473 psi | 89% | 1191 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 31,720 psi | 89% | 1224 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 31,531 psi | 89% | 1273 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 80% | 30,255 psi | 85% | 1168 fps | 97.9% |
| ADI AR 2207 | <<locked>> | 98% | 29,544 psi | 83% | 1270 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,797 psi | 53% | 699 fps | 100% |
| Lovex S053 | 14.7 gr | 80% | 22,524 psi | 63% | 1112 fps | 95% |
| ReloadSwiss RS 14 | 5.6 gr | 80% | 18,202 psi | 51% | 715 fps | 100% |
| SNPE Vectan BA6 1/2 | 13.4 gr | 80% | 21,683 psi | 61% | 1063 fps | 99.9% |
| Vihtavuori N110 | <<locked>> | 80% | 26,455 psi | 74% | 1158 fps | 99.9% |
| Vihtavuori N120 | <<locked>> | 92% | 25,396 psi | 71% | 1188 fps | 95.1% |
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 8 powders for .401 Win. SL loaded with the .410 | 400gr | Barnes Banded Solid. ADI AR 2207 delivers the highest muzzle velocity at 1,286 fps; across all powders the maximum-charge window runs from 787 fps to 1,286 fps. ADI AR 2207 gives the best case fill at 100 %, and 8 of the 8 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (245 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 400.0 gr projectile in 0.41" calls for a 1:19.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, 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. Lovex S053, SNPE Vectan BA6 1/2, ReloadSwiss RS 14 rank at the top here: for .401 Win. SL with the .410 | 400gr | Barnes Banded Solid they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, Lovex S053, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.