Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 85gr | Lehigh Defense Xtreme Cavitator bullet and 3 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 14.
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 APS 450 | <<locked>> | 82% | 45,005 psi | 89% | 1844 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 20,639 psi | 41% | 1447 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 19,508 psi | 38% | 1470 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 APS 450 | <<locked>> | 80% | 43,207 psi | 85% | 1818 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 14,953 psi | 29% | 1289 fps | 100% |
| ReloadSwiss RS 14 | 4.9 gr | 80% | 14,286 psi | 28% | 1312 fps | 100% |
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 3 powders for .300 AAC Blackout loaded with the .308 | 85gr | Lehigh Defense Xtreme Cavitator. ADI APS 450 delivers the highest muzzle velocity at 1,844 fps; across all powders the maximum-charge window runs from 1,447 fps to 1,844 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 3 of the 3 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 38–89 %, leaving at least 11 % headroom. Hodgdon TrailBoss, 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. ReloadSwiss RS 14, Hodgdon LilGun, Lovex S040 rank at the top here: for .300 AAC Blackout with the .308 | 85gr | Lehigh Defense Xtreme Cavitator they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.