I don't recommend the Hornady tool for checking run out, reason why is it only does loaded rounds, I use a Sinclair concentricity gauge, it can and should be used at each step of the loading process to identify where run out is coming from, clean fired brass should have no more than .001 runout in the body/neck, that same figure should come after FL sizing, if YOU introduced more adjust your sizing technique, don't be so quick to bash your sizing die, same for seating ammo, if runout is .001 all the way thru the loading process then seated bullets have more than .002 runout adjust your technique. .002 runout or less is GTG, more than that shows up on target, if you need/want less runout I recommend Neck Turning after all other tricks fail to produce straight ammo, I know it's not fashionable to recommend turning necks here, I do it, and it's not a waste of time, but is very time consuming.