RAF Lou: I dont think that there is a good time for a gun jam is there ? I know as a cowboy shooter, one of my Revolvers went south so I had to leave instead of finishing my paid for Game. Another time at a range, I saw a person having trouble with the Bolt working on a M-1 Garand . Come to find out , He had stuck a 303 rd in a 30 06 hole . After the Range Safety guy applied a size 12 boot the op rod slid back an ejected the Incorrect size Rd. and He was asked to leave the Range. All in All jams are not good.