Ok I am using Lee Collet die on once fired FC brass from my 5r. I processed the brass yesterday and tumbled the whole time I was at work. I primed the brass, filled them with Varget, went to seat a SMK and when I pulled it out off the press I could pull the SMK right out. If I use the full size die the neck size is fine but not with the Collet die. What am I doing wrong here?