Trajetory Technologies, Inc. has produced a line of ammunition called TRAJETECH ™ that is the exact standards and tolerances you require.
TRAJETECH "Tracing a New Path."
Specifications:
Caliber: 7.62x39
Bullet Type: Tracer
Grain Weight: 147
Velocity: 1700fps
Energy: 940 Ft. Lbs.
Twist Rate: 1 in 10
Rounds per Box: 20
Recommended Usage: Target
TRAJETECH "Tracing a New Path."
Specifications:
Caliber: 7.62x39
Bullet Type: Tracer
Grain Weight: 147
Velocity: 1700fps
Energy: 940 Ft. Lbs.
Twist Rate: 1 in 10
Rounds per Box: 20
Recommended Usage: Target