Just spitballing here but if the shell plate was not tight would that not affect all stations in a similar manor? If I am interpreting the op correctly its only station 2 thats affected.
Not necessarily, if he were only loading one round at a time. As far as I understand from dillon is that all stations need to be occupied to get most accurate loading due to possible movements in shell plate. I've tested this theory and it's true to and extent. But only maybe .002"+/- if single loading rounds. That's why I thought to check the powder die or funnel. I had a 45 ACP funnel that was giving me crap. And come to find out the funnel had debris stuck to it cause case issues I'm guessing it was old powder that had gotten caked on it.