"Many people are measuring run out in the wrong way and getting extra "
True. But, a lot of people measure runout incorrectly and get much lower
numbers than they really have. I know one guy who used the excellant Sinclair concentricity gage by positioning his dial indicator plunger directly above the steel balls so all he was reading was how round his bullets were! (It was easy to correct him tho, he was new to concentricity testing and was doing it wrong but he wasn't stupid!
No matter how we measure runout or what our numbers are, what we should be working for is "0" and if we get that we're good no matter how we read it. (Unless we're just 'checking' the bullets themselves!