Birchwood Casey Prairie Chuck Silhouette Target Each target is a solid 3/16" thick hung from a durable, welded steel frame to provide years of trouble-free practice The Rim fire Spinners are designed for 22 rim fire cartridges using only soft-nosed bullets The Magnum Spinners are designed for center fire handgun cartridges up to 44 magnum using only soft nosed bullets Portable and easy-to-use spinning targets mean no more knocked down targets to set-up