The quiet .22 — a conical-bullet evolution of the BB Cap that uses .22 Short or Long case length but with primer-only propellant. Extremely quiet in a rifle; used today for pest control, indoor training, and suppressor-less quiet shooting.
Type: Rimfire
Introduced: 1888, United States
Parent case: .22 BB Cap
Standardization: SAAMI
Bullet diameter: 0.222" (5.64 mm)
Case length: 0.695" (17.65 mm)
Overall length: 0.94" (23.88 mm)
Max pressure: 6,000 PSI
Rim type: Rimfire
Primer: Rimfire
Typical twist rate: 1:16
Muzzle velocity: 700–710 fps
Muzzle energy: 32–33 ft-lbs
Effective range: 25 yd
Common bullet weights: 29 gr
Primary use: Pest Control, Target, Training
Production status: Active
Also known as: CB Cap · .22 Conical Ball Cap · .22 CB Short · .22 CB Long
History: The CB Cap replaced the round-ball BB Cap with a conical bullet for better accuracy and modest energy improvement, while retaining the all-priming-compound propellant design. CCI revived and standardized the design for the modern market, producing CB Short (on .22 Short brass) and CB Long (on .22 Long brass) variants. Both chamber and fire in standard .22 LR firearms. In a rifle barrel, the CB…
Notable firearms: Any .22 LR bolt-action or single-shot rifle, Ruger 10/22, Marlin 60
Similar cartridges: .22 BB Cap, .22 Short, .22 LR