Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 200gr | Reichenberg Subsonic bullet and 19 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, Shooters World SOCOM and Lovex D063.
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>> | 88% | 44,019 psi | 87% | 1558 fps | 96.3% |
| Accurate No. 11 FS | <<locked>> | 88% | 44,541 psi | 88% | 1562 fps | 99.1% |
| ADI AR 2205 | <<locked>> | 90% | 44,556 psi | 88% | 1509 fps | 99.9% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 34,925 psi | 69% | 1529 fps | 97.4% |
| Hodgdon LilGun | <<locked>> | 84% | 43,830 psi | 86% | 1588 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,021 psi | 53% | 928 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 44,251 psi | 87% | 1562 fps | 98% |
| Lovex D060 | <<locked>> | 90% | 44,019 psi | 87% | 1558 fps | 96.3% |
| Lovex D063 | <<locked>> | 90% | 44,237 psi | 87% | 1552 fps | 97% |
| Lovex S040 | <<locked>> | 82% | 43,366 psi | 85% | 1486 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 43,947 psi | 87% | 1568 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,136 psi | 51% | 948 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 44,715 psi | 88% | 1601 fps | 98% |
| Shooters World Blackout | <<locked>> | 88% | 45,774 psi | 90% | 1575 fps | 96.8% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 44,019 psi | 87% | 1558 fps | 96.3% |
| Shooters World SOCOM | <<locked>> | 90% | 44,237 psi | 87% | 1552 fps | 97% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 40,596 psi | 80% | 1460 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 44,077 psi | 87% | 1535 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 33,112 psi | 65% | 1480 fps | 97.9% |
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>> | 84% | 39,131 psi | 77% | 1499 fps | 95.1% |
| Accurate No. 11 FS | 12.9 gr | 80% | 34,214 psi | 67% | 1444 fps | 97.3% |
| ADI AR 2205 | <<locked>> | 80% | 32,895 psi | 65% | 1375 fps | 98.5% |
| ADI AR 2207 | <<locked>> | 94% | 29,051 psi | 57% | 1444 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 38,551 psi | 76% | 1535 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,247 psi | 38% | 820 fps | 100% |
| IMR 4227 | <<locked>> | 88% | 33,156 psi | 65% | 1427 fps | 95.2% |
| Lovex D060 | <<locked>> | 86% | 39,131 psi | 77% | 1499 fps | 95.1% |
| Lovex D063 | 14 gr | 86% | 38,421 psi | 76% | 1486 fps | 95.6% |
| Lovex S040 | <<locked>> | 80% | 40,654 psi | 80% | 1460 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 24,685 psi | 49% | 1309 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,739 psi | 37% | 843 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 33,112 psi | 65% | 1463 fps | 95% |
| Shooters World Blackout | <<locked>> | 84% | 40,495 psi | 80% | 1519 fps | 95.5% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 39,131 psi | 77% | 1499 fps | 95.1% |
| Shooters World SOCOM | 14 gr | 86% | 38,421 psi | 76% | 1486 fps | 95.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 23,511 psi | 46% | 1243 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 29,617 psi | 58% | 1371 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 26,107 psi | 51% | 1368 fps | 95.3% |
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 .308 | 200gr | Reichenberg Subsonic. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,601 fps; across all powders the maximum-charge window runs from 928 fps to 1,601 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 51–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Hodgdon TrailBoss, Lovex S053 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, Shooters World SOCOM, Lovex D063 rank at the top here: for .300 AAC Blackout with the .308 | 200gr | Reichenberg Subsonic 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.