Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 190gr | MEN HPBT Match 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, Alliant Reloder-7 and ADI AR 2207.
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 1680 | <<locked>> | 98% | 45,919 psi | 90% | 1673 fps | 96% |
| Accurate 5744 | <<locked>> | 82% | 45,150 psi | 89% | 1670 fps | 97.1% |
| Accurate No. 11 FS | <<locked>> | 84% | 42,917 psi | 85% | 1637 fps | 99.2% |
| ADI AR 2205 | <<locked>> | 88% | 45,411 psi | 89% | 1608 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 38,986 psi | 77% | 1670 fps | 98.6% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 42,047 psi | 83% | 1670 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,021 psi | 55% | 997 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 45,716 psi | 90% | 1670 fps | 98.6% |
| Lovex D060 | <<locked>> | 88% | 45,150 psi | 89% | 1670 fps | 97.1% |
| Lovex D063 | <<locked>> | 84% | 44,338 psi | 87% | 1657 fps | 97% |
| Lovex S053 | <<locked>> | 98% | 45,745 psi | 90% | 1677 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,267 psi | 54% | 1017 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 43,874 psi | 86% | 1686 fps | 98.2% |
| Shooters World Blackout | <<locked>> | 84% | 44,338 psi | 87% | 1657 fps | 97% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 45,150 psi | 89% | 1670 fps | 97.1% |
| Shooters World SOCOM | <<locked>> | 88% | 44,831 psi | 88% | 1654 fps | 97.6% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 44,875 psi | 88% | 1581 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 43,758 psi | 86% | 1611 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 39,479 psi | 78% | 1654 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 |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 42,757 psi | 84% | 1640 fps | 95.2% |
| Accurate 5744 | <<locked>> | 80% | 42,221 psi | 83% | 1631 fps | 96.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 37,942 psi | 75% | 1578 fps | 98.5% |
| ADI AR 2205 | <<locked>> | 80% | 35,621 psi | 70% | 1493 fps | 99.3% |
| ADI AR 2207 | 14.6 gr | 88% | 27,499 psi | 54% | 1493 fps | 95.1% |
| Alliant Reloder-7 | 16.9 gr | 98% | 39,987 psi | 79% | 1644 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,465 psi | 40% | 889 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 32,518 psi | 64% | 1499 fps | 95.5% |
| Lovex D060 | <<locked>> | 82% | 38,014 psi | 75% | 1575 fps | 95.3% |
| Lovex D063 | <<locked>> | 80% | 39,204 psi | 77% | 1594 fps | 95.8% |
| Lovex S053 | <<locked>> | 80% | 27,934 psi | 55% | 1437 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,030 psi | 39% | 909 fps | 100% |
| ReloadSwiss RS 36 | 14.9 gr | 86% | 32,648 psi | 64% | 1539 fps | 95.4% |
| Shooters World Blackout | <<locked>> | 80% | 39,204 psi | 77% | 1594 fps | 95.8% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 38,014 psi | 75% | 1575 fps | 95.3% |
| Shooters World SOCOM | <<locked>> | 80% | 35,114 psi | 69% | 1532 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,716 psi | 53% | 1362 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,938 psi | 65% | 1486 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 25,237 psi | 50% | 1427 fps | 95.4% |
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 | 190gr | MEN HPBT Match. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,686 fps; across all powders the maximum-charge window runs from 997 fps to 1,686 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 54–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-7, Hodgdon TrailBoss 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, Alliant Reloder-7, ADI AR 2207 rank at the top here: for .300 AAC Blackout with the .308 | 190gr | MEN HPBT Match 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.