Load Specifications
Load data in caliber .300 AAC Blackout with .311 | 123gr | Lehigh Defense Controlled Chaos bullet and 7 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 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 |
|---|---|---|---|---|---|---|
| ADI AR 2205ᴾ | <<locked>> | 100% | 44,715 psi | 88% | 1946 fps | 95.6% |
| Hodgdon LilGun | <<locked>> | 96% | 43,323 psi | 85% | 2103 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,511 psi | 46% | 1191 fps | 100% |
| Lovex S040 | <<locked>> | 92% | 43,424 psi | 86% | 1955 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,452 psi | 44% | 1214 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 29,124 psi | 57% | 1752 fps | 98.5% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 36,651 psi | 72% | 1919 fps | 98.8% |
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 AR 2205 | <<locked>> | 98% | 42,250 psi | 83% | 1913 fps | 95% |
| Hodgdon LilGun | 13.8 gr | 80% | 25,512 psi | 50% | 1798 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,129 psi | 34% | 1063 fps | 100% |
| Lovex S040 | 11.8 gr | 80% | 30,472 psi | 60% | 1749 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,549 psi | 33% | 1086 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 21,712 psi | 43% | 1585 fps | 95.4% |
| Vihtavuori N110 | 12.5 gr | 88% | 25,976 psi | 51% | 1726 fps | 95.6% |
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 .311 | 123gr | Lehigh Defense Controlled Chaos. Hodgdon LilGun delivers the highest muzzle velocity at 2,103 fps; across all powders the maximum-charge window runs from 1,191 fps to 2,103 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 44–88 %, leaving at least 12 % headroom. The 123.0 gr projectile in 0.311" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. 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, Vihtavuori N110 rank at the top here: for .300 AAC Blackout with the .311 | 123gr | Lehigh Defense Controlled Chaos 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.