I have 2 RCBS Posi-Prime hand primer tools but there is a problem. I need the large and small seating stems that fits them. I understand (have been told) that one of the newer RCBS primer tools seating stems will work in the RCBS. Does anyone have confirmation information on that and if so, what tool? Maybe I could get stems from RCBS if I knew the correct tool that is compatible, stem wise. Thanks for any help, james