I use Dillon sizers that are also trimmers in a one step operation. I assume these are made of regular steel, not carbide? Then, I deburr brass. Then, I resize again with RCBS to remove primer and streighten case mouth (most of them). I have to run 308s through a SB sizer or they will not feed into my M1A. If I am not doing something correct, chime in. I was really concerned with dies being worn to a point that they would affect perfect seating in the next process and thus provide poor runout and crappy accuracy.
Dillon has carbide 308 SB dies??????? I have several Lee pistol carbide dies. Those are sweet!!!!!!!