Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 130gr | Barnes X BT bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N110, ADI AR 2205 and SNPE Vectan BA6 1/2.
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>> | 92% | 44,324 psi | 87% | 1952 fps | 97.7% |
| Hodgdon LilGun | <<locked>> | 86% | 43,018 psi | 85% | 2073 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,311 psi | 54% | 1234 fps | 100% |
| Lovex S040 | <<locked>> | 86% | 45,716 psi | 90% | 1982 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 40,785 psi | 80% | 1985 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,498 psi | 52% | 1260 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 37,927 psi | 75% | 1880 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 45,905 psi | 90% | 2037 fps | 100% |
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 | 15.3 gr | 84% | 35,346 psi | 70% | 1814 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 35,621 psi | 70% | 1962 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,233 psi | 40% | 1102 fps | 100% |
| Lovex S040 | <<locked>> | 80% | 38,928 psi | 77% | 1886 fps | 99.6% |
| Lovex S053 | <<locked>> | 94% | 35,172 psi | 69% | 1893 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,783 psi | 39% | 1125 fps | 100% |
| SNPE Vectan BA6 1/2 | 12.6 gr | 80% | 23,656 psi | 47% | 1608 fps | 98.2% |
| Vihtavuori N110 | 13 gr | 80% | 28,689 psi | 57% | 1759 fps | 98.3% |
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 .300 AAC Blackout loaded with the .308 | 130gr | Barnes X BT. Hodgdon LilGun delivers the highest muzzle velocity at 2,073 fps; across all powders the maximum-charge window runs from 1,234 fps to 2,073 fps. Hodgdon TrailBoss 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 (350 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, Lovex S053, 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. Vihtavuori N110, ADI AR 2205, SNPE Vectan BA6 1/2 rank at the top here: for .300 AAC Blackout with the .308 | 130gr | Barnes X BT they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss 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.