Load Specifications
Load data in caliber .30 Carbine with .308 | 110gr | Hornady FMJ bullet and 2 powders. The key underlying parameters are shown in the table above.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI APS 450 | <<locked>> | 82% | 41,350 psi | 89% | 1453 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,330 psi | 31% | 1115 fps | 100% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI APS 450 | <<locked>> | 80% | 40,030 psi | 86% | 1440 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 8,659 psi | 19% | 968 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 2 powders for .30 Carbine loaded with the .308 | 110gr | Hornady FMJ. ADI APS 450 delivers the highest muzzle velocity at 1,453 fps; across all powders the maximum-charge window runs from 1,115 fps to 1,453 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 2 of the 2 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 31–89 %, leaving at least 11 % headroom. 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. Hodgdon TrailBoss 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.