I size my brass to fit my chamber. I don't make a habit of shooting ammo from one rifle in a different rifle. Why would someone want to bump their shoulder back .004" or more if .001"-.002 is plenty? I can tell you do this a lot but what I have found in practice is vastly different from your experience. No right or wrong here...That's why I asked. It is good to know what others reasoning's are. Thanks for sharing that stuff. A lot of guys get pissed when you ask those questions and I appreciate you humoring me.