Some dies sets permit entire reloading with a few dies. Others may possibly demand a fourth die for your taper crimp. Taper crimping, as opposed to roll crimping, really should usually be done While using the 9mm. There was a large discussion on listed here many years ago about it, https://9mm-bullets-for-reloading97528.mpeblog.com/63896610/not-known-facts-about-reloading-9mm-luger