If I recall, don't follow Lee's instrucitons to the letter. Try adjusting the die up or down with a case inserted. You want the die adjusted so that when you just about hit the bottom of the press' stroke, the die sort of pops. If you have a weak bench, you'll know when you hit that point 'cause all sorts of stuff on your bench will jump or fall over. Might save you $4 plus shipping for a new mandrel.