Load Specifications
Load data in caliber 7.62 x 39 (M43) Russian with .311 | 123gr | Lehigh Defense Controlled Chaos bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, IMR 4227 and Lovex S053.
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 |
|---|---|---|---|---|---|---|
| Accurate 5744 | <<locked>> | 86% | 44,353 psi | 86% | 2310 fps | 95.7% |
| Accurate No. 11 FS | <<locked>> | 86% | 44,527 psi | 86% | 2300 fps | 98.8% |
| ADI AR 2205 | <<locked>> | 88% | 44,005 psi | 85% | 2221 fps | 99.7% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 37,971 psi | 74% | 2297 fps | 97.5% |
| Hodgdon LilGun | <<locked>> | 82% | 44,701 psi | 87% | 2352 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,296 psi | 53% | 1424 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 44,686 psi | 87% | 2306 fps | 97.6% |
| Lovex D060 | <<locked>> | 88% | 44,353 psi | 86% | 2310 fps | 95.7% |
| Lovex D063 | <<locked>> | 88% | 44,034 psi | 86% | 2280 fps | 96.4% |
| Lovex S040 | <<locked>> | 82% | 45,992 psi | 89% | 2251 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 44,715 psi | 87% | 2320 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,731 psi | 52% | 1460 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 45,571 psi | 89% | 2359 fps | 97.6% |
| Shooters World Blackout | <<locked>> | 86% | 46,224 psi | 90% | 2326 fps | 96.3% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 44,353 psi | 86% | 2310 fps | 95.7% |
| Shooters World SOCOM | <<locked>> | 88% | 44,034 psi | 86% | 2280 fps | 96.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 43,308 psi | 84% | 2195 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 44,788 psi | 87% | 2277 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 38,464 psi | 75% | 2270 fps | 98.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 5744 | <<locked>> | 84% | 41,713 psi | 81% | 2267 fps | 95% |
| Accurate No. 11 FS | <<locked>> | 80% | 36,840 psi | 72% | 2175 fps | 97.3% |
| ADI AR 2205 | <<locked>> | 80% | 34,708 psi | 67% | 2070 fps | 98.3% |
| ADI AR 2207 | <<locked>> | 94% | 31,836 psi | 62% | 2175 fps | 95.6% |
| Hodgdon LilGun | <<locked>> | 80% | 41,829 psi | 81% | 2313 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,856 psi | 39% | 1273 fps | 100% |
| IMR 4227 | 20.3 gr | 88% | 34,998 psi | 68% | 2142 fps | 95% |
| Lovex D060 | <<locked>> | 86% | 41,713 psi | 81% | 2267 fps | 95% |
| Lovex D063 | <<locked>> | 86% | 41,365 psi | 80% | 2238 fps | 95.7% |
| Lovex S040 | <<locked>> | 80% | 43,047 psi | 84% | 2211 fps | 100% |
| Lovex S053 | 18.1 gr | 80% | 26,571 psi | 52% | 1978 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,203 psi | 37% | 1299 fps | 100% |
| ReloadSwiss RS 36 | 22.1 gr | 90% | 35,505 psi | 69% | 2195 fps | 95% |
| Shooters World Blackout | <<locked>> | 84% | 42,902 psi | 83% | 2277 fps | 95.5% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 41,713 psi | 81% | 2267 fps | 95% |
| Shooters World SOCOM | <<locked>> | 86% | 41,365 psi | 80% | 2238 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,556 psi | 50% | 1896 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 31,488 psi | 61% | 2067 fps | 100% |
| Vihtavuori N120 | <<locked>> | 90% | 28,587 psi | 56% | 2073 fps | 95.5% |
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 19 powders for 7.62 x 39 (M43) Russian loaded with the .311 | 123gr | Lehigh Defense Controlled Chaos. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,359 fps; across all powders the maximum-charge window runs from 1,424 fps to 2,359 fps. ADI AR 2207 gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.311" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, 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. ReloadSwiss RS 36, IMR 4227, Lovex S053 rank at the top here: for 7.62 x 39 (M43) Russian with the .311 | 123gr | Lehigh Defense Controlled Chaos they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.