I've been asking this same question, several times a year, on this and other boards. Where in the hell have you all been? I just "tuned" the RCBS FL dies as instructed above. The result is 30 pieces of brass all less than .002" most in the .001"-.0015" range. Nearly all of these had been tossed aside due to excessive run out. Mostly in the .004"-.006" range. I don't remember how much run out I had in the brass before putting it though the Neck sizing die. But I know most all of it came out .004"-.005" out of round. I didn't use it very long before putting it back in the box and setting it on the shelf. If you were wanting to buy it, you're too late. I traded it this afternoon for 300 pieces of 200 grain semi wad cutters for my 45. I think I got a great deal, at least I'll use the wad cutters.