Description
The 12.7mm 57-BZ-542 cartridge with B-32 armor-piercing incendiary bullet is used against enemy personnel, soft-skinned ground and low-flying vehicles when fired from 12.7mm machine guns, except the YakB-12.7mm machine gun, at temperatures from -50 to +50 °C.
| Caliber, mm |
12,7 |
| Max weight, g: |
|
| cartridge |
137 |
| bullet |
49 |
| Cartridge length, mm |
147 |
| Average bullet velocity V25, m/s |
810-825 |
| Probability of penetrating a 20mm thick armor plate at 100 meters, not less than, % |
90 |
| Peak value of maximum gas pressure, not more than, MPa (kgf/cm2) |
333,4 (3400) |
| Mean value of maximum gas pressure, not more than, MPa (kgf/cm2) |
304,0 (3100) |
| Cartridge case material |
brass |
