Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 156gr | Peregrine VRG-2 bullet and 10 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>> | 90% | 43,410 psi | 86% | 1824 fps | 97.4% |
| ADI AR 2205 | <<locked>> | 92% | 43,395 psi | 85% | 1762 fps | 98.9% |
| Hodgdon LilGun | <<locked>> | 88% | 45,324 psi | 89% | 1903 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,614 psi | 50% | 1093 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 42,844 psi | 84% | 1814 fps | 95.6% |
| Lovex S040 | <<locked>> | 86% | 45,426 psi | 89% | 1788 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 40,001 psi | 79% | 1798 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,598 psi | 48% | 1115 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 36,941 psi | 73% | 1690 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 45,469 psi | 90% | 1831 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 | 15.5 gr | 84% | 35,723 psi | 70% | 1719 fps | 95.5% |
| ADI AR 2205 | 13.6 gr | 80% | 30,414 psi | 60% | 1575 fps | 95.8% |
| Hodgdon LilGun | <<locked>> | 80% | 34,127 psi | 67% | 1762 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,449 psi | 36% | 971 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 40,611 psi | 80% | 1781 fps | 95% |
| Lovex S040 | <<locked>> | 80% | 37,710 psi | 74% | 1693 fps | 100% |
| Lovex S053 | <<locked>> | 88% | 28,471 psi | 56% | 1614 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,840 psi | 35% | 994 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 21,625 psi | 43% | 1434 fps | 98.9% |
| Vihtavuori N110 | 12.2 gr | 80% | 26,455 psi | 52% | 1565 fps | 99.1% |
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 19 powders for .300 AAC Blackout loaded with the .308 | 156gr | Peregrine VRG-2. Hodgdon LilGun delivers the highest muzzle velocity at 1,903 fps; across all powders the maximum-charge window runs from 1,093 fps to 1,903 fps. ADI AR 2207 gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Hodgdon TrailBoss, IMR 4227 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 VRG-2 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 5744, ADI AR 2207, Lovex D060 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.