Load Specifications
Load data in caliber .300 AAC Blackout with .311 | 123gr | Sellier & Bellot FMJ 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, Vihtavuori N110 and Lovex S040.
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 2205 | <<locked>> | 98% | 43,859 psi | 86% | 1969 fps | 96.1% |
| Hodgdon LilGun | <<locked>> | 94% | 43,816 psi | 86% | 2136 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,801 psi | 47% | 1214 fps | 100% |
| Lovex S040 | <<locked>> | 90% | 43,584 psi | 86% | 1988 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,308 psi | 46% | 1247 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 30,995 psi | 61% | 1811 fps | 99.2% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 39,073 psi | 77% | 1985 fps | 99.4% |
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>> | 94% | 39,436 psi | 78% | 1906 fps | 95% |
| Hodgdon LilGun | 14.7 gr | 80% | 27,456 psi | 54% | 1867 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,651 psi | 35% | 1089 fps | 100% |
| Lovex S040 | 12.6 gr | 80% | 32,387 psi | 64% | 1814 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,549 psi | 33% | 1102 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 20,755 psi | 41% | 1581 fps | 95.4% |
| Vihtavuori N110 | 12.7 gr | 84% | 24,758 psi | 49% | 1722 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 | Sellier & Bellot FMJ. Hodgdon LilGun delivers the highest muzzle velocity at 2,136 fps; across all powders the maximum-charge window runs from 1,214 fps to 2,136 fps. Hodgdon TrailBoss 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 46–86 %, leaving at least 14 % headroom. 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. Hodgdon LilGun, Vihtavuori N110, Lovex S040 rank at the top here: for .300 AAC Blackout with the .311 | 123gr | Sellier & Bellot FMJ 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.