The 22 CHeetah was developed by Jim Carmichel, shooting editor of Outdoor Life magazine and Fred Huntington of RCBS fame. It appears to have originated in the late 1970’s. The cartridge is essentially a full length Remington 308 BR case, with a smaller primer pocket, necked down to 22 caliber, but with the shoulder moved forward. What you end up with is a variation of the 308 Winchester necked down to 22, but using a special match case. This is not exactly new because there are in existence several slightly different versions made by necking the 243 Winchester case down, and these date back to the early 1960’s. However, the 22 CHeetah is an original with regard to the 308 BR case and its smaller rifle primer pocket.