I'm trying to FL resize my 243 brass with Lee dies. I used the die to FL size the brass when new, with no problems. I neck sized from then on out, for the next 4 firings, and now my bolt lift is getting heavier, so its time to FL size again. The problem is that the die is leaving a ridge at the bottom of the shoulder just a hair above where it meets the body. I can feel it catch on my finger nail on one side of the case, but not the other.