howler I think we are both correct the 223 was also made from the 222 and originally called the 222special before it became the 223rem that we know today.anyway all these small calibers are great performers in accurate rifles,and the coyote cant tell any difference from a 14caliber wildcat to a 243,when you pick his dead carcass up he is still dead.CALL'EM IN CLOSE AND KILL'EM ALL