The subtle radius of each shell holder mouth ensures smooth and reliable functioning. The retainer spring is designed to stay in place when inserting cases into the shell plate. #8. Fits: 30 Luger, 30 Mauser, 9mm Luger, 9x21, 9x23 Win, 38 Auto, 38 Super Auto, 9x18 Makarov and more. For a complete list visit Hornady's website.