This is an ultra-quiet round designed by CCI specifically for suppressed shooting.
This round is a subsonic round, traveling below the speed of sound, which prevents the loud crack of a round breaking the sound barrier.
Caliber: .22 LR
Bullet weight: 40 gr
Bullet Type: Lead round nose
Muzzle velocity: 710 feet per second
Muzzle Energy: 45 ft-lbs