[fred cook]

Don't know if you are aware of the 220 swift's history, but it was developed from the 6mm Lee Navy cartridge. The Lee Navy came along about 1895 and was a pioneer in cartridge design. Unfortunately, the Lee Navy was replaced by other rifles shortly after the turn of the century. It used a 6mm, 120-135 grain bullet and was a rimless case. Muzzle velocity was in the 2500-2700 fps range. A real barn burner compared to the 1200 fps of the 45-70! Later (much later), the small rim was added, the case slightly reformed and the case necked down to .22 caliber to make the .220 Swift. If you happen to own one of the rare 6mm Lee Navy military rifles or even rarer civilian versions, ammo can be made by reverse engineering the 220 Swift case! However, you will have to find one of the super rare stripper clips in order to shoot it as a repeater. One last tidbit, the Lee Navy was a straight pull design bolt action rifle that could be fired quite rapidly! The Lee Navy rifles were used by the Marines during the Boxer rebellion in China in 1898!