Some dies sets let comprehensive reloading with three dies. Other individuals may well need a fourth die for the taper crimp. Taper crimping, as an alternative to roll crimping, should usually be finished Along with the 9mm. The down below pictures and data are from a super in-depth write-up from https://9mm-brass86306.blogsidea.com/44203781/5-tips-about-9mm-brass-you-can-use-today