Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 150gr | Woodleigh FN SN bullet and 14 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Lovex S053, Vihtavuori N110 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 |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 86% | 43,366 psi | 85% | 1923 fps | 98.1% |
| ADI AR 2205 | <<locked>> | 88% | 43,540 psi | 86% | 1864 fps | 99.4% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 36,869 psi | 73% | 1916 fps | 96.5% |
| Hodgdon LilGun | <<locked>> | 82% | 43,671 psi | 86% | 1972 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,427 psi | 54% | 1181 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 43,366 psi | 85% | 1923 fps | 96.7% |
| Lovex S040 | <<locked>> | 82% | 45,281 psi | 89% | 1883 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 43,352 psi | 85% | 1936 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,469 psi | 52% | 1204 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 44,179 psi | 87% | 1975 fps | 96.7% |
| Shooters World SOCOM | <<locked>> | 90% | 45,876 psi | 90% | 1946 fps | 96.1% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 42,409 psi | 84% | 1841 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 44,164 psi | 87% | 1909 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 37,405 psi | 74% | 1900 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 |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 80% | 35,665 psi | 70% | 1811 fps | 96.4% |
| ADI AR 2205 | 15.8 gr | 80% | 34,243 psi | 67% | 1729 fps | 97.8% |
| ADI AR 2207 | <<locked>> | 96% | 32,692 psi | 64% | 1844 fps | 95.1% |
| Hodgdon LilGun | <<locked>> | 80% | 40,379 psi | 80% | 1929 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,957 psi | 39% | 1050 fps | 100% |
| IMR 4227 | <<locked>> | 92% | 38,943 psi | 77% | 1860 fps | 95.5% |
| Lovex S040 | <<locked>> | 80% | 42,525 psi | 84% | 1847 fps | 100% |
| Lovex S053 | 15.3 gr | 82% | 27,920 psi | 55% | 1683 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,406 psi | 38% | 1073 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 39,160 psi | 77% | 1903 fps | 95.4% |
| Shooters World SOCOM | <<locked>> | 88% | 43,178 psi | 85% | 1909 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,005 psi | 49% | 1575 fps | 99.9% |
| Vihtavuori N110 | 14.2 gr | 80% | 30,879 psi | 61% | 1719 fps | 99.9% |
| Vihtavuori N120 | <<locked>> | 92% | 29,530 psi | 58% | 1759 fps | 95.2% |
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 23 powders for .300 AAC Blackout loaded with the .308 | 150gr | Woodleigh FN SN. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,975 fps; across all powders the maximum-charge window runs from 1,181 fps to 1,975 fps. ADI AR 2207 gives the best case fill at 100 %, and 23 of the 23 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. ADI AR 2207, Alliant Reloder-7, Hodgdon TrailBoss 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. Lovex S053, Vihtavuori N110, ADI AR 2205 rank at the top here: for .300 AAC Blackout with the .308 | 150gr | Woodleigh FN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 1680, Alliant Reloder-7, IMR 4198 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.