My brass is clean before reloading. Was with a tumbler, but now it can be the tumbler or rotary with SS pins or combination of both. A good deal, I couldn't pass up on black Friday for the SS pin rotary. I check every finished cartridge with a case gauge or barrel. Some will have excess lube, which actually can cause a tight fit. I just wipe those off will a rag, and then they usually fit. If they don't, they go into a "pull" box, to later remove the bullet & resize. I do think, that because of the inspections I give to the final product, it's a reason I don't have failures at the range. I'll load the slow method with a single stage, or mass produce with the Dillon.