Some dies sets enable whole reloading with 3 dies. Other individuals may possibly demand a fourth die for that taper crimp. Taper crimping, rather than roll crimping, must usually be completed with the 9mm. Hello there, I live in S. CA and recently purchased my first pistol, a S&W SD9VE https://9mmbrass62851.blogacep.com/43049070/5-simple-statements-about-9mm-casing-explained