I recently heard a shooter say that he uses a "fired" case for a go gauge (and then sticks a piece of tape on the back of it for the no-go guage). I am of the opinion that if he is going to use a case for a gauge, it would be a FAR better choice to use a "sized" case (re-sized in a reloading press/die), with reasoning being that the fired case will likely be streched beyond the true "go" size. Am I not correct about that? But then I got to thinking, maybe it would be even MORE accurate to use a completely fresh VIRGIN case (unfired & un-resized). Or would that actually be shorter than the true go size??