I always deprime before cleaning, then tumble with pins. I won't put a dirty case in my dies. Stainless pins clean the primer pocket as well as the inside.Yes, it is an extra step. And yes, I do have a progressive. What is better? Running that junk from the primers thru my progressive or depriming and cleaning before running them in my dies. Just food for thought. By the way, I use a Lee decapper and haven't had one yet that didn't come out, and I've run a lot of PPU's through that decapper.