I’m using RCBS dies to load for 7x57mm Mauser. I have a full length sizer, neck sizer, and bullet seat die. I started with brand new virgin brass. Full length sized, loaded and fire formed. Now I neck size only. The problem I have is after the brass is in the sizing die, and I bring the press arm back up retracting the brass from the die, the brass hangs up on the expander that is part of the decaping pin. It drags and is difficult to pass over and makes a scraping sound. Is this normal? Shouldn’t it operate this stage of the loading process more smoothly? Am I not lubricating something correctly?