Load Specifications
Load data in caliber 7.62 x 39 (M43) Russian with .310 | 123gr | Barnes TAC-X 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% | 45,919 psi | 89% | 2388 fps | 97% |
| Accurate No. 11 FS | <<locked>> | 84% | 44,135 psi | 86% | 2343 fps | 99.2% |
| ADI AR 2205 | <<locked>> | 88% | 46,427 psi | 90% | 2306 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 40,785 psi | 79% | 2392 fps | 98.8% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 43,903 psi | 85% | 2385 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,775 psi | 54% | 1470 fps | 100% |
| IMR 4227 | <<locked>> | 94% | 44,382 psi | 86% | 2352 fps | 98.2% |
| Lovex D060 | <<locked>> | 88% | 46,412 psi | 90% | 2395 fps | 97.1% |
| Lovex D063 | <<locked>> | 84% | 45,672 psi | 89% | 2372 fps | 97.1% |
| Lovex S053 | <<locked>> | 96% | 44,512 psi | 86% | 2362 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,658 psi | 52% | 1496 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 45,281 psi | 88% | 2405 fps | 98.3% |
| Shooters World Blackout | <<locked>> | 84% | 45,672 psi | 89% | 2372 fps | 97.1% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 46,412 psi | 90% | 2395 fps | 97.1% |
| Shooters World SOCOM | <<locked>> | 88% | 46,485 psi | 90% | 2369 fps | 97.7% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 45,672 psi | 89% | 2264 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 44,744 psi | 87% | 2316 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 41,220 psi | 80% | 2365 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% | 43,337 psi | 84% | 2346 fps | 96.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 38,725 psi | 75% | 2257 fps | 98.4% |
| ADI AR 2205 | <<locked>> | 80% | 36,260 psi | 70% | 2146 fps | 99.2% |
| ADI AR 2207 | <<locked>> | 90% | 29,762 psi | 58% | 2178 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 98% | 40,901 psi | 79% | 2336 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,899 psi | 39% | 1309 fps | 100% |
| IMR 4227 | 21.1 gr | 84% | 32,750 psi | 64% | 2146 fps | 95.1% |
| Lovex D060 | <<locked>> | 82% | 38,580 psi | 75% | 2260 fps | 95% |
| Lovex D063 | <<locked>> | 80% | 39,624 psi | 77% | 2274 fps | 95.5% |
| Lovex S053 | 19.7 gr | 80% | 27,804 psi | 54% | 2054 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,189 psi | 37% | 1335 fps | 100% |
| ReloadSwiss RS 36 | 23 gr | 86% | 33,301 psi | 65% | 2198 fps | 95.2% |
| Shooters World Blackout | <<locked>> | 80% | 39,624 psi | 77% | 2274 fps | 95.5% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 38,580 psi | 75% | 2260 fps | 95% |
| Shooters World SOCOM | <<locked>> | 82% | 38,000 psi | 74% | 2231 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,440 psi | 51% | 1955 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,909 psi | 64% | 2133 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 26,905 psi | 52% | 2080 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 | Barnes TAC-X. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,405 fps; across all powders the maximum-charge window runs from 1,470 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 52–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.31" calls for a 1:16.0 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 | Barnes TAC-X 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.