Norma VERMINXTREME 243 Winchester 76gr (500 rounds)NORMA VerminXtreme delivers massive shock effect when you need to take aggressive measures against natures most relentless intruders. The . 243 Win. was originally a wildcat designed by Warren Page who necked down the . 308 case in the early fifties. The goal was to make a light deer rifle which would still have the advantages of the high velocity . 22 calibers for varmint hunting. In 1955 Winchester made it a commercial round. The . 243 is a very