Load Specifications
Load data in caliber .300 AAC Blackout with .310 | 123gr | Hornady SP bullet and 7 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Vihtavuori N110 and ADI AR 2205.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 98% | 44,367 psi | 87% | 1978 fps | 96.3% |
| Hodgdon LilGun | <<locked>> | 94% | 44,411 psi | 87% | 2146 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,294 psi | 48% | 1224 fps | 100% |
| Lovex S040 | <<locked>> | 92% | 45,716 psi | 90% | 2021 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,235 psi | 46% | 1247 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 30,835 psi | 61% | 1811 fps | 99.2% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 39,595 psi | 78% | 1995 fps | 99.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | 16.2 gr | 96% | 42,105 psi | 83% | 1946 fps | 95.7% |
| Hodgdon LilGun | 14.7 gr | 80% | 27,383 psi | 54% | 1864 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,608 psi | 35% | 1089 fps | 100% |
| Lovex S040 | <<locked>> | 80% | 32,242 psi | 64% | 1811 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,955 psi | 33% | 1112 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 20,653 psi | 41% | 1581 fps | 95.4% |
| Vihtavuori N110 | 12.7 gr | 84% | 24,700 psi | 49% | 1719 fps | 95.6% |
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 7 powders for .300 AAC Blackout loaded with the .310 | 123gr | Hornady SP. Hodgdon LilGun delivers the highest muzzle velocity at 2,146 fps; across all powders the maximum-charge window runs from 1,224 fps to 2,146 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 7 of the 7 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (350 MPa), the top charges use 46–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. Hodgdon LilGun, Vihtavuori N110, ADI AR 2205 rank at the top here: for .300 AAC Blackout with the .310 | 123gr | Hornady SP 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.