A 7.62x54mm R BT gzh (GRAU Index - 7BT1) cartridge with a 9.2 gram armor-piercing tracer bullet with a pointed heat-strengthened steel core with a bimetallic jacket, in a bimetallic case; intended for target designation and fire adjustment in battle (Trace color: Red). This BT bullet (Bronebóynaya Trassíruyushchaya - "Armor-piercing Tracer") it's an improved version of the used in the 7.62x54mm R T-46M cartridge, since the lead core was replaced by one of heat-strengthened steel, providing automatic firearms with penetration capabilities against basic, intermediate and specialize ballistic body protections as well as providing a significant stopping power effect.
