I use Lee hand primer
with any type of primers, including Federal. Never had one go off. And, if one did, it really wouldn't matter, because the primer is contained well enough so that only a flame coming out of the case mouth would offer any hazard. So, I just point the case away from me when I squeeze the handle. And I don't have any powder open when I am priming.
Never tried the RCS or any other hand primer tool because the Lee has worked so well for me for for more than 3 decades.
SL1
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