I'm using a 223 lee collet die for my new 223ai. Using the 223 lee seater die also. I have a lot of groups with two in one hole and one flyer off to the side opening the group up. I think that a better seating die might help. I don't have anyway to measure run out. What sweater die is best for 223ai.
Redding comp says cannot be used with compressed loads.
