Hornady seating die with no crimp. The sizing die is a standard RCBS (not small base). As a side note, I\’ve loaded lots of these 75gr 3GH bullets with Ramshot Tac, and still believe Tac is a bit too fast for bullets of this weight. I see occasional ejector swipes with moderate loads even on brass like LC. I\’ll probably stick with CFE-223 from now on. The current rifle is a Ruger 16\” AR-556 MPR (mid-length gas system).