Originated by Lysle Kilbourn in 1940, this was one of the first of the so called "improved" cartridges. It is based on the fire formed and blown out of the 22 Hornet case with a straight body, sharp shoulder and short neck. The popularity of the 22 K-Hornet was based on increased performance, plus the fact that any regular factory loaded ammunition could also be fired in the same chamber. In addition, the conversion is quite cheap, and any Hornet rifle can be rechambered. Ammunition is no problem because the round is based on easily obtainable factory ammunition. It brings the 22 Hornet into the same class as the 218 Bee with the added advantage that the 22 Hornet was chambered in several good bolt action rifles. It is suitable for the same range of varmints and small game as the 218 Bee. Those lucky enough to find an original Kimber rifle chambered for the 22 K-Hornet can pride themselves in owning a superb rifle. 

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