Read the instructions again. It is a two step adjustment process. Raise the seating plug and screw the die down on a case until you fell it hitting the top. This is the starting place for the crimp. Next, place a bullet in the case and then adjust the seating stem to give you a little over the correct COL. Lower the case and then screw the die down a little and test the crimp and COL. You will have to make several adjustments to get the correct COL and crimp.
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