Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 156gr | Peregrine Backup (VRG-2) bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate No. 11 FS, 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>> | 96% | 44,425 psi | 88% | 1745 fps | 95.9% |
| ADI AR 2205 | <<locked>> | 98% | 44,991 psi | 89% | 1693 fps | 97.8% |
| Hodgdon LilGun | <<locked>> | 94% | 44,628 psi | 88% | 1824 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,801 psi | 47% | 1017 fps | 100% |
| Lovex S040 | <<locked>> | 90% | 43,468 psi | 86% | 1686 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,756 psi | 45% | 1040 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 31,125 psi | 61% | 1545 fps | 99.9% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 40,263 psi | 79% | 1703 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 |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | 14.5 gr | 94% | 41,655 psi | 82% | 1716 fps | 95.2% |
| ADI AR 2205 | 12.5 gr | 88% | 33,446 psi | 66% | 1549 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 27,731 psi | 55% | 1601 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,100 psi | 34% | 906 fps | 100% |
| Lovex S040 | <<locked>> | 80% | 32,503 psi | 64% | 1545 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,505 psi | 33% | 928 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 18,550 psi | 37% | 1302 fps | 96.1% |
| Vihtavuori N110 | 10.2 gr | 80% | 22,002 psi | 43% | 1417 fps | 96.2% |
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 8 powders for .300 AAC Blackout loaded with the .308 | 156gr | Peregrine Backup (VRG-2). Hodgdon LilGun delivers the highest muzzle velocity at 1,824 fps; across all powders the maximum-charge window runs from 1,017 fps to 1,824 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 8 of the 8 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. The 156.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. Accurate No. 11 FS, Vihtavuori N110, ADI AR 2205 rank at the top here: for .300 AAC Blackout with the .308 | 156gr | Peregrine Backup (VRG-2) they combine a high case fill with complete burn and sit in the upper velocity band. 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.