Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 150gr | Woodleigh HS bullet and 12 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate No. 11 FS, Vihtavuori N110 and Lovex S053.
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 |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 88% | 44,396 psi | 87% | 1913 fps | 97.9% |
| ADI AR 2205 | <<locked>> | 90% | 43,874 psi | 86% | 1844 fps | 99.2% |
| Hodgdon LilGun | <<locked>> | 84% | 44,208 psi | 87% | 1959 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,731 psi | 53% | 1155 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 43,729 psi | 86% | 1903 fps | 96.2% |
| Lovex S040 | <<locked>> | 84% | 45,658 psi | 90% | 1864 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 43,540 psi | 86% | 1916 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,382 psi | 52% | 1188 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 44,135 psi | 87% | 1949 fps | 96.2% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 40,350 psi | 79% | 1798 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 43,874 psi | 86% | 1883 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 35,563 psi | 70% | 1844 fps | 96.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | 16.2 gr | 80% | 33,910 psi | 67% | 1759 fps | 95.2% |
| ADI AR 2205 | <<locked>> | 80% | 32,982 psi | 65% | 1683 fps | 97% |
| Hodgdon LilGun | <<locked>> | 80% | 38,087 psi | 75% | 1883 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,566 psi | 39% | 1030 fps | 100% |
| IMR 4227 | <<locked>> | 94% | 39,073 psi | 77% | 1837 fps | 95% |
| Lovex S040 | <<locked>> | 80% | 40,625 psi | 80% | 1801 fps | 100% |
| Lovex S053 | 14.8 gr | 84% | 27,847 psi | 55% | 1663 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,014 psi | 37% | 1053 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 39,581 psi | 78% | 1883 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 23,902 psi | 47% | 1535 fps | 99.6% |
| Vihtavuori N110 | 13.5 gr | 80% | 29,573 psi | 58% | 1677 fps | 99.7% |
| Vihtavuori N120 | <<locked>> | 96% | 31,386 psi | 62% | 1772 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 21 powders for .300 AAC Blackout loaded with the .308 | 150gr | Woodleigh HS. Hodgdon LilGun delivers the highest muzzle velocity at 1,959 fps; across all powders the maximum-charge window runs from 1,155 fps to 1,959 fps. Accurate 1680 gives the best case fill at 100 %, and 21 of the 21 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 150.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 1680, ADI AR 2207, Alliant Reloder-7 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. Accurate No. 11 FS, Vihtavuori N110, Lovex S053 rank at the top here: for .300 AAC Blackout with the .308 | 150gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 1680, Accurate 5744, Alliant Reloder-7 burn incompletely and react more sensitively to barrel length and temperature. 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.