High Quality Content by WIKIPEDIA articles! Cowboy Action Shooting (CAS), also known as Western Action Shooting or Single Action Shooting, is a competitive shooting sport that originated in California, USA, in the early 1980s. Cowboy Action Shooting is now practiced in many places with several sanctioning organizations including the Single Action Shooting Society (SASS), Western Action Shootists Association (WASA), and National Congress of Old West Shooters (NCOWS), as well as others in the USA and in other countries.