Load Specifications
Load data in caliber .300 AAC Blackout with .311 | 150gr | Sierra Pro-Hunter bullet and 9 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 Lovex S053.
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% | 45,600 psi | 90% | 1873 fps | 97.2% |
| ADI AR 2205 | <<locked>> | 94% | 45,629 psi | 90% | 1811 fps | 98.8% |
| Hodgdon LilGun | <<locked>> | 88% | 44,179 psi | 87% | 1919 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,599 psi | 50% | 1106 fps | 100% |
| Lovex S040 | <<locked>> | 86% | 44,353 psi | 87% | 1801 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 39,204 psi | 77% | 1811 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,266 psi | 50% | 1138 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 36,767 psi | 72% | 1713 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 44,382 psi | 87% | 1847 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 | 15.7 gr | 86% | 37,594 psi | 74% | 1768 fps | 95.3% |
| ADI AR 2205 | <<locked>> | 82% | 32,198 psi | 63% | 1624 fps | 95.7% |
| Hodgdon LilGun | <<locked>> | 80% | 33,997 psi | 67% | 1788 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,043 psi | 38% | 994 fps | 100% |
| Lovex S040 | <<locked>> | 80% | 37,550 psi | 74% | 1716 fps | 99.8% |
| Lovex S053 | 14.6 gr | 92% | 31,734 psi | 63% | 1693 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,970 psi | 35% | 1007 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 21,828 psi | 43% | 1453 fps | 98.5% |
| Vihtavuori N110 | 12.1 gr | 80% | 26,527 psi | 52% | 1585 fps | 98.6% |
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 9 powders for .300 AAC Blackout loaded with the .311 | 150gr | Sierra Pro-Hunter. Hodgdon LilGun delivers the highest muzzle velocity at 1,919 fps; across all powders the maximum-charge window runs from 1,106 fps to 1,919 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.311" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, Lovex S053, 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. Accurate No. 11 FS, Vihtavuori N110, Lovex S053 rank at the top here: for .300 AAC Blackout with the .311 | 150gr | Sierra Pro-Hunter 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.