I just got my reloading press and most of the goodies that go with it. I am new at this so please bear with me for another dumb question. I have some dies ordered for it. It's a lee breech lock challenger press. A buddy of mine has some dies he said I can borrow but their various different brands. Rcbs is one I know of. My question is will the dies interchange with other brand of equipment such as my lee press or are they brand specific?