Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 90gr | Impala LWHV LS bullet and 6 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 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 |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | <<locked>> | 96% | 45,324 psi | 89% | 2579 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,685 psi | 49% | 1499 fps | 100% |
| Lovex S040 | <<locked>> | 92% | 44,440 psi | 88% | 2398 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,757 psi | 47% | 1529 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 30,603 psi | 60% | 2152 fps | 97.1% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 38,421 psi | 76% | 2369 fps | 97.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | 17.7 gr | 82% | 29,283 psi | 58% | 2257 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,362 psi | 36% | 1342 fps | 100% |
| Lovex S040 | 15.2 gr | 82% | 33,982 psi | 67% | 2201 fps | 95.2% |
| ReloadSwiss RS 14 | 5.7 gr | 80% | 17,782 psi | 35% | 1368 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 26,731 psi | 53% | 2054 fps | 95.4% |
| Vihtavuori N110 | <<locked>> | 92% | 31,212 psi | 61% | 2218 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 7 powders for .300 AAC Blackout loaded with the .308 | 90gr | Impala LWHV LS. Hodgdon LilGun delivers the highest muzzle velocity at 2,579 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,579 fps. ADI AR 2205 gives the best case fill at 100 %, and 7 of the 7 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. ADI AR 2205, 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. Hodgdon LilGun, Lovex S040, ReloadSwiss RS 14 rank at the top here: for .300 AAC Blackout with the .308 | 90gr | Impala LWHV LS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2205 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.