Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 150gr | Winchester Powerpoint 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% | 43,569 psi | 86% | 1926 fps | 98.2% |
| ADI AR 2205 | <<locked>> | 90% | 45,759 psi | 90% | 1890 fps | 99.6% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 36,477 psi | 72% | 1909 fps | 96.4% |
| Hodgdon LilGun | <<locked>> | 82% | 43,163 psi | 85% | 1965 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,499 psi | 54% | 1181 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 43,569 psi | 86% | 1926 fps | 96.7% |
| Lovex S040 | <<locked>> | 82% | 44,759 psi | 88% | 1873 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 43,555 psi | 86% | 1939 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,556 psi | 52% | 1204 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 43,743 psi | 86% | 1969 fps | 96.6% |
| Shooters World SOCOM | <<locked>> | 90% | 45,440 psi | 90% | 1939 fps | 96% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 42,583 psi | 84% | 1844 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 43,642 psi | 86% | 1903 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 37,014 psi | 73% | 1893 fps | 97.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 80% | 35,824 psi | 71% | 1811 fps | 96.4% |
| ADI AR 2205 | 15.7 gr | 80% | 33,895 psi | 67% | 1719 fps | 97.7% |
| ADI AR 2207 | <<locked>> | 96% | 32,866 psi | 65% | 1847 fps | 95.1% |
| Hodgdon LilGun | <<locked>> | 80% | 40,582 psi | 80% | 1932 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,015 psi | 39% | 1050 fps | 100% |
| IMR 4227 | <<locked>> | 92% | 38,508 psi | 76% | 1854 fps | 95.4% |
| Lovex S040 | <<locked>> | 80% | 42,685 psi | 84% | 1847 fps | 100% |
| Lovex S053 | 15.2 gr | 82% | 27,601 psi | 54% | 1677 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,435 psi | 38% | 1073 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 38,856 psi | 77% | 1896 fps | 95.3% |
| Shooters World SOCOM | <<locked>> | 88% | 42,757 psi | 84% | 1903 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,106 psi | 49% | 1575 fps | 99.9% |
| Vihtavuori N110 | 14.2 gr | 80% | 31,024 psi | 61% | 1719 fps | 99.9% |
| Vihtavuori N120 | <<locked>> | 92% | 29,675 psi | 58% | 1762 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 | Winchester Powerpoint. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,969 fps; across all powders the maximum-charge window runs from 1,181 fps to 1,969 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. The 150.0 gr projectile in 0.308" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. 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 | Winchester Powerpoint 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.