Be careful of getting the newer sleeved seaters from Hornady for auto calibers with the generic "crimp" insert in them which is closer to a roll crimp than a taper crimp. It does a "modified" roll crimp very well. I use one for .32 Mag, but it doesn't do a good taper crimp IMHO, as the angle is much too steep. Get a Lee, RCBS, or Redding straight taper crimp die or seater with taper crimp built in.