Quote Originally Posted by jrgreene1968 View Post
That’s what I’m thinking..especially at distance .
This would need to be really extreme to have a noticeable affect. Think, a side-mounted scope where this would def be true. The line of sight of the scope is substantially offset- as in inches, not potentially thousandths of an inch. In the former case it's obvious that the lines of sight through the scope and bore would only cross at the "zero" range, and then diverge again. Unless there's some severe defect in the barrel (and you'd see it, where the nut shoulders up to the receiver) it wouldn't be enough to manifest the severe symptoms you're stating.

You could use a precision ground, ring-lapping tool to "roughly" check the alignment of the rings (non-alignable rings) to see if anything really jumps out as to front/rear alignment.