Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 125gr | Nosler AccuBond bullet and 7 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 ADI AR 2205.
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>> | 96% | 45,455 psi | 90% | 2024 fps | 97.5% |
| Hodgdon LilGun | <<locked>> | 90% | 43,511 psi | 86% | 2149 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,092 psi | 49% | 1250 fps | 100% |
| Lovex S040 | <<locked>> | 88% | 44,266 psi | 87% | 2024 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,062 psi | 47% | 1276 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 34,069 psi | 67% | 1886 fps | 99.9% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 43,598 psi | 86% | 2067 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 | 16.1 gr | 88% | 35,708 psi | 70% | 1877 fps | 95.1% |
| Hodgdon LilGun | 16 gr | 80% | 30,835 psi | 61% | 1949 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,202 psi | 36% | 1115 fps | 100% |
| Lovex S040 | 13.7 gr | 80% | 34,867 psi | 69% | 1883 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,593 psi | 35% | 1138 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 20,131 psi | 40% | 1585 fps | 96.1% |
| Vihtavuori N110 | <<locked>> | 80% | 24,468 psi | 48% | 1732 fps | 96.5% |
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 7 powders for .300 AAC Blackout loaded with the .308 | 125gr | Nosler AccuBond. Hodgdon LilGun delivers the highest muzzle velocity at 2,149 fps; across all powders the maximum-charge window runs from 1,250 fps to 2,149 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 7 of the 7 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. 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, ADI AR 2205 rank at the top here: for .300 AAC Blackout with the .308 | 125gr | Nosler AccuBond 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.