Load Specifications
Load data in caliber .30 Carbine with .31 | 123gr | Prvi Partizan SP RN bullet and 6 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Lovex S040 and ReloadSwiss RS 14.
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% | 37,913 psi | 82% | 1955 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,074 psi | 45% | 1106 fps | 100% |
| Lovex S040 | <<locked>> | 96% | 40,030 psi | 86% | 1831 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,073 psi | 43% | 1132 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 24,091 psi | 52% | 1588 fps | 95.6% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 28,601 psi | 62% | 1722 fps | 95.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | 12 gr | 88% | 25,889 psi | 56% | 1749 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 15,127 psi | 33% | 984 fps | 100% |
| Lovex S040 | 10.1 gr | 86% | 30,560 psi | 66% | 1686 fps | 95.2% |
| ReloadSwiss RS 14 | 3.6 gr | 80% | 14,620 psi | 32% | 1007 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 23,076 psi | 50% | 1562 fps | 95% |
| Vihtavuori N110 | <<locked>> | 98% | 27,267 psi | 59% | 1699 fps | 95.2% |
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 6 powders for .30 Carbine loaded with the .31 | 123gr | Prvi Partizan SP RN. Hodgdon LilGun delivers the highest muzzle velocity at 1,955 fps; across all powders the maximum-charge window runs from 1,106 fps to 1,955 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 43–86 %, leaving at least 14 % headroom. Hodgdon LilGun, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Lovex S040, ReloadSwiss RS 14 rank at the top here: for .30 Carbine with the .31 | 123gr | Prvi Partizan SP RN 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.