Load Specifications
Load data in caliber .30 Carbine with .308 | 110gr | X-TREME RN bullet and 4 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 |
|---|---|---|---|---|---|---|
| Hodgdon LilGunᴾ | <<locked>> | 100% | 30,501 psi | 66% | 2041 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,650 psi | 34% | 1178 fps | 100% |
| Lovex S040ᴾ | <<locked>> | 100% | 38,899 psi | 84% | 2005 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,358 psi | 29% | 1188 fps | 100% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | <<locked>> | 96% | 26,020 psi | 56% | 1952 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 10,283 psi | 22% | 1047 fps | 100% |
| Lovex S040 | <<locked>> | 94% | 31,662 psi | 68% | 1893 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 8,195 psi | 18% | 1033 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 6 powders for .30 Carbine loaded with the .308 | 110gr | X-TREME RN. Hodgdon LilGun delivers the highest muzzle velocity at 2,041 fps; across all powders the maximum-charge window runs from 1,178 fps to 2,041 fps. Hodgdon LilGun gives the best case fill at 100 %, and 6 of the 6 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 29–84 %, leaving at least 16 % headroom. Hodgdon LilGun, Hodgdon TrailBoss, Lovex S040 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. As outliers, SNPE Vectan BA6 1/2, Vihtavuori N110 burn incompletely and react more sensitively to barrel length and temperature. 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.