Load Specifications
Load data in caliber 7.62 x 39 (M43) Russian with .311 | 123gr | Speer FMJ 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 ADI AR 2207.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 5744 | <<locked>> | 82% | 46,427 psi | 90% | 2385 fps | 97% |
| Accurate No. 11 FS | <<locked>> | 84% | 44,889 psi | 87% | 2343 fps | 99.2% |
| ADI AR 2205 | <<locked>> | 86% | 44,338 psi | 86% | 2264 fps | 99.9% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,669 psi | 81% | 2395 fps | 98.8% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,411 psi | 86% | 2382 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,152 psi | 55% | 1467 fps | 100% |
| IMR 4227 | <<locked>> | 94% | 44,991 psi | 87% | 2349 fps | 98.2% |
| Lovex D060 | <<locked>> | 86% | 44,353 psi | 86% | 2352 fps | 96.5% |
| Lovex D063 | <<locked>> | 84% | 46,325 psi | 90% | 2369 fps | 97.1% |
| Lovex S053 | <<locked>> | 96% | 45,266 psi | 88% | 2362 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,586 psi | 54% | 1499 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 46,093 psi | 90% | 2408 fps | 98.3% |
| Shooters World Blackout | <<locked>> | 84% | 46,325 psi | 90% | 2369 fps | 97.1% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 44,353 psi | 86% | 2352 fps | 96.5% |
| Shooters World SOCOM | <<locked>> | 86% | 43,947 psi | 85% | 2320 fps | 97.1% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 46,325 psi | 90% | 2264 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 45,469 psi | 88% | 2316 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 42,061 psi | 82% | 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% | 43,816 psi | 85% | 2343 fps | 96.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 39,479 psi | 77% | 2257 fps | 98.4% |
| ADI AR 2205 | <<locked>> | 80% | 36,840 psi | 72% | 2146 fps | 99.2% |
| ADI AR 2207 | 22.4 gr | 88% | 28,848 psi | 56% | 2142 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 96% | 39,479 psi | 77% | 2300 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,247 psi | 39% | 1306 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 33,315 psi | 65% | 2146 fps | 95.2% |
| Lovex D060 | <<locked>> | 82% | 39,552 psi | 77% | 2267 fps | 95.2% |
| Lovex D063 | <<locked>> | 80% | 40,176 psi | 78% | 2270 fps | 95.6% |
| Lovex S053 | 19.5 gr | 80% | 28,514 psi | 55% | 2057 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,001 psi | 39% | 1339 fps | 100% |
| ReloadSwiss RS 36 | 22.8 gr | 86% | 34,040 psi | 66% | 2201 fps | 95.3% |
| Shooters World Blackout | <<locked>> | 80% | 40,176 psi | 78% | 2270 fps | 95.6% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 39,552 psi | 77% | 2267 fps | 95.2% |
| Shooters World SOCOM | <<locked>> | 80% | 36,056 psi | 70% | 2185 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,398 psi | 53% | 1962 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 34,040 psi | 66% | 2142 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 26,136 psi | 51% | 2044 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 18 powders for 7.62 x 39 (M43) Russian loaded with the .311 | 123gr | Speer FMJ. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,408 fps; across all powders the maximum-charge window runs from 1,467 fps to 2,408 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 54–90 %, leaving at least 10 % headroom. 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, ADI AR 2207 rank at the top here: for 7.62 x 39 (M43) Russian with the .311 | 123gr | Speer FMJ 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.