Old Roper, thanks for putting up those links. It was very interesting reading that reinforced my thoughts on prepping cases to eliminate variables. It isn't going to make me a better shot, but maybe it'll help a little and I'll take what I can get.
Of particular interest was the first fellow's case resizing, using the bushing die that just sets the shoulder back a tiny amount. He's maintaining, and doing it very precisely, the fireformed case. That logic works for me.