Upon reading the instructions on these dies I understand to do the following. Adjust die down until it meets the shell holder. Then adjust stem back 1/16 of a turn so that bushing has a minute amount of give, (slight rattle). I have been sizing only about 1/2 of the neck and adjusting the stem for this, the bushing is very loose in the die. Checking my loaded rounds for concentricity I'm reading .002-.004. Is this about as good as it's going to get?