Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets bullet and 10 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Accurate No. 11 FS 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 |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 92% | 44,208 psi | 87% | 1499 fps | 98.2% |
| ADI AR 2205 | <<locked>> | 94% | 44,121 psi | 87% | 1447 fps | 99.4% |
| Hodgdon LilGun | <<locked>> | 88% | 43,004 psi | 85% | 1535 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,585 psi | 50% | 876 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 41,147 psi | 81% | 1463 fps | 96% |
| Lovex S040 | <<locked>> | 86% | 43,656 psi | 86% | 1440 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 38,450 psi | 76% | 1457 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,700 psi | 49% | 899 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 36,245 psi | 71% | 1371 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 45,905 psi | 90% | 1503 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 | 11.5 gr | 82% | 31,894 psi | 63% | 1358 fps | 95.2% |
| ADI AR 2205 | <<locked>> | 80% | 29,051 psi | 57% | 1270 fps | 96.2% |
| Hodgdon LilGun | 11.3 gr | 80% | 32,750 psi | 65% | 1430 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,579 psi | 37% | 784 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 39,247 psi | 77% | 1444 fps | 95.5% |
| Lovex S040 | <<locked>> | 80% | 36,796 psi | 72% | 1368 fps | 100% |
| Lovex S053 | <<locked>> | 86% | 25,846 psi | 51% | 1286 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,390 psi | 34% | 794 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 20,842 psi | 41% | 1158 fps | 99.2% |
| Vihtavuori N110 | 9.2 gr | 80% | 25,672 psi | 51% | 1270 fps | 99.4% |
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 20 powders for .300 AAC Blackout loaded with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. Hodgdon LilGun delivers the highest muzzle velocity at 1,535 fps; across all powders the maximum-charge window runs from 876 fps to 1,535 fps. Accurate 1680 gives the best case fill at 100 %, and 20 of the 20 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 1680, ADI AR 2207, Hodgdon TrailBoss 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, Accurate No. 11 FS, Vihtavuori N110 rank at the top here: for .300 AAC Blackout with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 1680, 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.