Load Specifications
Load data in caliber 7.62 x 39 (M43) Russian with .310 | 123gr | Hornady SST bullet and 18 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Lovex S053 and IMR 4227.
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>> | 82% | 46,412 psi | 90% | 2382 fps | 96.9% |
| Accurate No. 11 FS | <<locked>> | 84% | 44,875 psi | 87% | 2339 fps | 99.2% |
| ADI AR 2205 | <<locked>> | 88% | 46,485 psi | 90% | 2293 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,191 psi | 80% | 2385 fps | 98.7% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,382 psi | 86% | 2379 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,920 psi | 54% | 1460 fps | 100% |
| IMR 4227 | <<locked>> | 94% | 44,962 psi | 87% | 2346 fps | 98.2% |
| Lovex D060 | <<locked>> | 86% | 43,845 psi | 85% | 2339 fps | 96.3% |
| Lovex D063 | <<locked>> | 84% | 45,745 psi | 89% | 2359 fps | 96.9% |
| Lovex S053 | <<locked>> | 96% | 45,223 psi | 88% | 2359 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,325 psi | 53% | 1493 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 46,122 psi | 90% | 2405 fps | 98.3% |
| Shooters World Blackout | <<locked>> | 84% | 45,745 psi | 89% | 2359 fps | 96.9% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 43,845 psi | 85% | 2339 fps | 96.3% |
| Shooters World SOCOM | <<locked>> | 86% | 43,961 psi | 85% | 2316 fps | 97.1% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 46,253 psi | 90% | 2260 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 45,397 psi | 88% | 2313 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 41,597 psi | 81% | 2356 fps | 99.5% |
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>> | 80% | 43,308 psi | 84% | 2333 fps | 96.2% |
| Accurate No. 11 FS | <<locked>> | 80% | 38,986 psi | 76% | 2247 fps | 98.3% |
| ADI AR 2205 | <<locked>> | 80% | 36,796 psi | 71% | 2142 fps | 99.1% |
| ADI AR 2207 | <<locked>> | 88% | 28,790 psi | 56% | 2139 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 98% | 41,379 psi | 80% | 2329 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,392 psi | 40% | 1306 fps | 100% |
| IMR 4227 | 20.8 gr | 84% | 33,257 psi | 65% | 2142 fps | 95.1% |
| Lovex D060 | <<locked>> | 82% | 39,044 psi | 76% | 2254 fps | 95% |
| Lovex D063 | <<locked>> | 80% | 40,219 psi | 78% | 2270 fps | 95.5% |
| Lovex S053 | 19.4 gr | 80% | 28,456 psi | 55% | 2051 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,754 psi | 38% | 1332 fps | 100% |
| ReloadSwiss RS 36 | 22.6 gr | 86% | 33,591 psi | 65% | 2188 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 40,219 psi | 78% | 2270 fps | 95.5% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 39,044 psi | 76% | 2254 fps | 95% |
| Shooters World SOCOM | <<locked>> | 82% | 38,232 psi | 74% | 2221 fps | 95.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,296 psi | 53% | 1959 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 33,489 psi | 65% | 2129 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 27,267 psi | 53% | 2070 fps | 95.7% |
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 18 powders for 7.62 x 39 (M43) Russian loaded with the .310 | 123gr | Hornady SST. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,405 fps; across all powders the maximum-charge window runs from 1,460 fps to 2,405 fps. ADI AR 2207 gives the best case fill at 100 %, and 18 of the 18 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.31" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-7, 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. ReloadSwiss RS 36, Lovex S053, IMR 4227 rank at the top here: for 7.62 x 39 (M43) Russian with the .310 | 123gr | Hornady SST 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.