Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 120gr | Reichenberg HDB Universal 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 Vihtavuori N110.
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% | 43,830 psi | 86% | 2054 fps | 96.9% |
| Hodgdon LilGun | <<locked>> | 92% | 44,092 psi | 87% | 2218 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,163 psi | 48% | 1280 fps | 100% |
| Lovex S040 | <<locked>> | 90% | 45,208 psi | 89% | 2093 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,989 psi | 45% | 1302 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 32,561 psi | 64% | 1916 fps | 99.7% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 41,698 psi | 82% | 2103 fps | 99.9% |
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 | <<locked>> | 90% | 36,680 psi | 72% | 1946 fps | 95% |
| Hodgdon LilGun | 16.3 gr | 80% | 28,935 psi | 57% | 1972 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,448 psi | 34% | 1138 fps | 100% |
| Lovex S040 | 14 gr | 80% | 33,823 psi | 67% | 1919 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,723 psi | 33% | 1165 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 19,160 psi | 38% | 1604 fps | 95.1% |
| Vihtavuori N110 | 13.4 gr | 80% | 22,756 psi | 45% | 1745 fps | 95.3% |
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 9 powders for .300 AAC Blackout loaded with the .308 | 120gr | Reichenberg HDB Universal. Hodgdon LilGun delivers the highest muzzle velocity at 2,218 fps; across all powders the maximum-charge window runs from 1,280 fps to 2,218 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 45–89 %, leaving at least 11 % headroom. 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. Hodgdon LilGun, Lovex S040, Vihtavuori N110 rank at the top here: for .300 AAC Blackout with the .308 | 120gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 11 FS, Lovex S053 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.