Load Specifications
Load data in caliber .300 AAC Blackout with .311 | 180gr | Sellier & Bellot SPRN bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Lovex S053 and IMR 4227.
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 5744 | <<locked>> | 84% | 45,745 psi | 90% | 1716 fps | 96.4% |
| Accurate No. 11 FS | <<locked>> | 86% | 43,961 psi | 87% | 1690 fps | 98.9% |
| ADI AR 2205 | <<locked>> | 88% | 43,714 psi | 86% | 1631 fps | 99.7% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 36,999 psi | 73% | 1686 fps | 97.6% |
| Hodgdon LilGun | <<locked>> | 82% | 43,410 psi | 86% | 1719 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,195 psi | 54% | 1014 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 43,671 psi | 86% | 1690 fps | 97.6% |
| Lovex D060 | <<locked>> | 90% | 45,745 psi | 90% | 1716 fps | 96.4% |
| Lovex D063 | <<locked>> | 86% | 44,817 psi | 88% | 1703 fps | 96.3% |
| Lovex S040 | <<locked>> | 82% | 45,223 psi | 89% | 1640 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 43,598 psi | 86% | 1699 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,021 psi | 53% | 1047 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 44,019 psi | 87% | 1732 fps | 97.6% |
| Shooters World Blackout | <<locked>> | 86% | 44,817 psi | 88% | 1703 fps | 96.3% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 45,745 psi | 90% | 1716 fps | 96.4% |
| Shooters World SOCOM | <<locked>> | 88% | 42,975 psi | 85% | 1673 fps | 96.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 42,815 psi | 84% | 1611 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 43,990 psi | 87% | 1663 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 37,536 psi | 74% | 1670 fps | 98.6% |
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 5744 | <<locked>> | 80% | 40,524 psi | 80% | 1650 fps | 95.1% |
| Accurate No. 11 FS | <<locked>> | 80% | 36,187 psi | 71% | 1594 fps | 97.4% |
| ADI AR 2205 | <<locked>> | 80% | 34,156 psi | 67% | 1512 fps | 98.5% |
| ADI AR 2207 | <<locked>> | 92% | 29,399 psi | 58% | 1565 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 41,060 psi | 81% | 1696 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,276 psi | 40% | 912 fps | 100% |
| IMR 4227 | 14.2 gr | 88% | 34,563 psi | 68% | 1568 fps | 95.3% |
| Lovex D060 | <<locked>> | 86% | 41,278 psi | 81% | 1660 fps | 95.3% |
| Lovex D063 | <<locked>> | 84% | 42,438 psi | 84% | 1673 fps | 95.7% |
| Lovex S040 | <<locked>> | 80% | 42,815 psi | 84% | 1614 fps | 100% |
| Lovex S053 | 12.7 gr | 80% | 26,513 psi | 52% | 1450 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,261 psi | 38% | 922 fps | 100% |
| ReloadSwiss RS 36 | 15.4 gr | 90% | 34,447 psi | 68% | 1604 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 84% | 42,438 psi | 84% | 1673 fps | 95.7% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 41,278 psi | 81% | 1660 fps | 95.3% |
| Shooters World SOCOM | <<locked>> | 84% | 38,043 psi | 75% | 1608 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,382 psi | 50% | 1381 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 31,227 psi | 62% | 1506 fps | 100% |
| Vihtavuori N120 | <<locked>> | 88% | 26,629 psi | 52% | 1493 fps | 95.1% |
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 .311 | 180gr | Sellier & Bellot SPRN. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,732 fps; across all powders the maximum-charge window runs from 1,014 fps to 1,732 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 53–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.311" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. ADI AR 2207, 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. ReloadSwiss RS 36, Lovex S053, IMR 4227 rank at the top here: for .300 AAC Blackout with the .311 | 180gr | Sellier & Bellot SPRN 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.