Load Specifications
Load data in caliber .300 AAC Blackout with .308 | 220gr | A-Square MONO RN bullet and 38 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma 200, ReloadSwiss RS 36 and Alliant Reloder-7.
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>> | 92% | 43,018 psi | 85% | 1529 fps | 97.4% |
| Accurate 1680 | <<locked>> | 92% | 43,018 psi | 85% | 1529 fps | 97.4% |
| ADI AR 2205 | <<locked>> | 84% | 44,556 psi | 88% | 1476 fps | 100% |
| ADI AR 2205 | <<locked>> | 84% | 44,556 psi | 88% | 1476 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 45,121 psi | 89% | 1611 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 45,121 psi | 89% | 1611 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 37,159 psi | 73% | 1539 fps | 96.5% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 37,159 psi | 73% | 1539 fps | 96.5% |
| Alliant Reloder-7 | <<locked>> | 98% | 45,876 psi | 90% | 1588 fps | 98.6% |
| Alliant Reloder-7 | <<locked>> | 98% | 45,876 psi | 90% | 1588 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,225 psi | 58% | 928 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,225 psi | 58% | 928 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,698 psi | 82% | 1545 fps | 98.2% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,698 psi | 82% | 1545 fps | 98.2% |
| IMR 4227 | <<locked>> | 90% | 43,743 psi | 86% | 1529 fps | 99.5% |
| IMR 4227 | <<locked>> | 90% | 43,743 psi | 86% | 1529 fps | 99.5% |
| Lovex D060 | <<locked>> | 84% | 45,049 psi | 89% | 1549 fps | 98.7% |
| Lovex D060 | <<locked>> | 84% | 45,049 psi | 89% | 1549 fps | 98.7% |
| Lovex S053 | <<locked>> | 92% | 44,295 psi | 87% | 1532 fps | 100% |
| Lovex S053 | <<locked>> | 92% | 44,295 psi | 87% | 1532 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 41,959 psi | 83% | 1588 fps | 98.3% |
| Norma 200ᴾ | <<locked>> | 100% | 41,959 psi | 83% | 1588 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,587 psi | 56% | 951 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,587 psi | 56% | 951 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 44,324 psi | 87% | 1565 fps | 99.5% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 44,324 psi | 87% | 1565 fps | 99.5% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 45,049 psi | 89% | 1549 fps | 98.7% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 45,049 psi | 89% | 1549 fps | 98.7% |
| Shooters World SOCOM | <<locked>> | 84% | 44,469 psi | 88% | 1532 fps | 99% |
| Shooters World SOCOM | <<locked>> | 84% | 44,469 psi | 88% | 1532 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 45,382 psi | 89% | 1457 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 45,382 psi | 89% | 1457 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 44,179 psi | 87% | 1483 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 44,179 psi | 87% | 1483 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 45,411 psi | 89% | 1588 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 45,411 psi | 89% | 1588 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 36,405 psi | 72% | 1486 fps | 95.7% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 36,405 psi | 72% | 1486 fps | 95.7% |
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>> | 86% | 35,534 psi | 70% | 1444 fps | 95.6% |
| Accurate 1680 | <<locked>> | 86% | 35,534 psi | 70% | 1444 fps | 95.6% |
| ADI AR 2205 | <<locked>> | 80% | 39,436 psi | 78% | 1424 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 39,436 psi | 78% | 1424 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 24,990 psi | 49% | 1339 fps | 96.3% |
| ADI AR 2207 | <<locked>> | 80% | 24,990 psi | 49% | 1339 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 96% | 32,866 psi | 65% | 1480 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 96% | 32,866 psi | 65% | 1480 fps | 95.1% |
| Alliant Reloder-7 | 14.8 gr | 86% | 31,836 psi | 63% | 1421 fps | 95.3% |
| Alliant Reloder-7 | 14.8 gr | 86% | 31,836 psi | 63% | 1421 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,393 psi | 42% | 827 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,393 psi | 42% | 827 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 31,763 psi | 63% | 1411 fps | 95.4% |
| IMR 4198 | <<locked>> | 90% | 31,763 psi | 63% | 1411 fps | 95.4% |
| IMR 4227 | <<locked>> | 80% | 32,169 psi | 63% | 1388 fps | 97.4% |
| IMR 4227 | <<locked>> | 80% | 32,169 psi | 63% | 1388 fps | 97.4% |
| Lovex D060 | <<locked>> | 80% | 39,900 psi | 79% | 1486 fps | 97.7% |
| Lovex D060 | <<locked>> | 80% | 39,900 psi | 79% | 1486 fps | 97.7% |
| Lovex S053 | <<locked>> | 80% | 31,618 psi | 62% | 1381 fps | 99.6% |
| Lovex S053 | <<locked>> | 80% | 31,618 psi | 62% | 1381 fps | 99.6% |
| Norma 200 | 15.7 gr | 90% | 31,111 psi | 61% | 1450 fps | 95.5% |
| Norma 200 | 15.7 gr | 90% | 31,111 psi | 61% | 1450 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,045 psi | 41% | 846 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,045 psi | 41% | 846 fps | 100% |
| ReloadSwiss RS 36 | 13.9 gr | 80% | 31,198 psi | 61% | 1404 fps | 97% |
| ReloadSwiss RS 36 | 13.9 gr | 80% | 31,198 psi | 61% | 1404 fps | 97% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 39,900 psi | 79% | 1486 fps | 97.7% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 39,900 psi | 79% | 1486 fps | 97.7% |
| Shooters World SOCOM | <<locked>> | 80% | 39,363 psi | 78% | 1476 fps | 98.2% |
| Shooters World SOCOM | <<locked>> | 80% | 39,363 psi | 78% | 1476 fps | 98.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 30,052 psi | 59% | 1296 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 30,052 psi | 59% | 1296 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 37,246 psi | 73% | 1414 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 37,246 psi | 73% | 1414 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 25,411 psi | 50% | 1329 fps | 97.6% |
| Vihtavuori N120 | <<locked>> | 80% | 25,411 psi | 50% | 1329 fps | 97.6% |
| Vihtavuori N130 | <<locked>> | 98% | 34,563 psi | 68% | 1463 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 98% | 34,563 psi | 68% | 1463 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 38 powders for .300 AAC Blackout loaded with the .308 | 220gr | A-Square MONO RN. ADI AR 2207 delivers the highest muzzle velocity at 1,611 fps; across all powders the maximum-charge window runs from 928 fps to 1,611 fps. ADI AR 2207 gives the best case fill at 100 %, and 38 of the 38 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. ADI AR 2207, ADI AR 2207, Alliant Reloder-10x 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. Norma 200, ReloadSwiss RS 36, Alliant Reloder-7 rank at the top here: for .300 AAC Blackout with the .308 | 220gr | A-Square MONO RN they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, 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.