Thinking about doing a semi-auto precision build (6.5CM or 224 Val). I’m set up for my bolt guns with Redding type S FL dies and use sinclair expander and turning mandrels for neck tension. Is that sufficient for gas guns or do I need to pick up something like a lee factory crimp die as well? Also is the use of a small base sizer die something still used for precision semi-auto work? My only previous semi-auto reloading experience was just 556 range ammo, so I’m wondering what all is needed pst what I have to get started.