The lee hand primer is the best idea sinced sliced bread. i cant tell you how many thousands of primers I have in stalled with this litttle jewel I clean mine from time to time and pit a little gun grease on the little cam and away we go for anothe thousand or so,, I get a true feel of the correct seating of the primer. Ive crushed some primers with it military crimp brass but never had one blow up but always wear saftey glasses as The lord only gave me two good eyes!