The 22 PPC was developed in 1974 by Dr. Louis Palmisano and Ferris Pindell, primarily as a benchrest cartridge. Although originally a wildcat, Sako of Finland introduced commercial rifles and ammunition late in 1987. Norma followed suit on 1993 with loaded ammunition. The cartridge is based on the 220 Russian case which is a necked down version of the 7.62x39mm Soviet military cartridge. The Wichita Engineering and Supply Co. made the first rifles for both the 22 PPC and 6mm PPC cartridges. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.