Load Specifications
Load data in caliber .300 AAC Blackout with .310 | 125gr | Speer HP TNT bullet and 14 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Vihtavuori N110 and Lovex S040.
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 |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 98% | 44,904 psi | 88% | 1969 fps | 96.6% |
| ADI AR 2205 | <<locked>> | 98% | 45,049 psi | 89% | 1978 fps | 96.8% |
| Hodgdon LilGun | <<locked>> | 94% | 45,208 psi | 89% | 2136 fps | 100% |
| Hodgdon LilGun | <<locked>> | 94% | 45,542 psi | 90% | 2146 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,453 psi | 48% | 1214 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,076 psi | 47% | 1211 fps | 100% |
| Lovex S040 | <<locked>> | 90% | 43,787 psi | 86% | 1978 fps | 99.6% |
| Lovex S040 | <<locked>> | 90% | 44,367 psi | 87% | 1991 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,395 psi | 46% | 1240 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,583 psi | 46% | 1247 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 31,256 psi | 62% | 1804 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 31,691 psi | 62% | 1818 fps | 99.5% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 40,205 psi | 79% | 1985 fps | 99.6% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 40,625 psi | 80% | 1998 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 94% | 39,682 psi | 78% | 1896 fps | 95.3% |
| ADI AR 2205 | <<locked>> | 92% | 37,985 psi | 75% | 1880 fps | 95% |
| Hodgdon LilGun | 14.9 gr | 80% | 27,847 psi | 55% | 1860 fps | 97.8% |
| Hodgdon LilGun | 14.9 gr | 80% | 28,239 psi | 56% | 1873 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,724 psi | 35% | 1083 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,463 psi | 34% | 1079 fps | 100% |
| Lovex S040 | 12.8 gr | 80% | 32,634 psi | 64% | 1804 fps | 97.7% |
| Lovex S040 | 12.8 gr | 80% | 33,141 psi | 65% | 1821 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,071 psi | 34% | 1106 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,868 psi | 33% | 1102 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 19,856 psi | 39% | 1545 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 20,204 psi | 40% | 1558 fps | 95.5% |
| Vihtavuori N110 | 12.6 gr | 82% | 23,627 psi | 47% | 1680 fps | 95.3% |
| Vihtavuori N110 | 12.3 gr | 80% | 22,713 psi | 45% | 1663 fps | 95% |
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 14 powders for .300 AAC Blackout loaded with the .310 | 125gr | Speer HP TNT. Hodgdon LilGun delivers the highest muzzle velocity at 2,146 fps; across all powders the maximum-charge window runs from 1,211 fps to 2,146 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 14 of the 14 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 46–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, 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, Vihtavuori N110, Lovex S040 rank at the top here: for .300 AAC Blackout with the .310 | 125gr | Speer HP TNT they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, 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.