Load Specifications
Load data in caliber .300 AAC Blackout with .310 | 123gr | Barnes TAC-X 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: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGunᴾ | <<locked>> | 100% | 45,890 psi | 90% | 2116 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,133 psi | 44% | 1161 fps | 100% |
| Lovex S040 | <<locked>> | 96% | 45,730 psi | 90% | 1965 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,002 psi | 41% | 1188 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 26,658 psi | 53% | 1690 fps | 97.3% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 33,504 psi | 66% | 1857 fps | 97.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | 13.4 gr | 82% | 24,323 psi | 48% | 1759 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 15,635 psi | 31% | 1030 fps | 100% |
| Lovex S040 | 11.5 gr | 82% | 30,066 psi | 59% | 1729 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 14,968 psi | 29% | 1053 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 92% | 21,872 psi | 43% | 1581 fps | 95% |
| Vihtavuori N110 | 12.4 gr | 92% | 26,339 psi | 52% | 1726 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 .300 AAC Blackout loaded with the .310 | 123gr | Barnes TAC-X. Hodgdon LilGun delivers the highest muzzle velocity at 2,116 fps; across all powders the maximum-charge window runs from 1,161 fps to 2,116 fps. Hodgdon LilGun 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 (350 MPa), the top charges use 41–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.31" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Hodgdon LilGun, 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. Hodgdon LilGun, Lovex S040, Vihtavuori N110 rank at the top here: for .300 AAC Blackout with the .310 | 123gr | Barnes TAC-X they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, 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.