Doing some research, Lo and behold bores that are not centered is common in guns, and considered a non-issue.
"If you want it concentric you turn or grind the OD between centers. Most barrels are profiled after rifling and concentricity ends up being a crap shoot. Ideally you are looking for good concentricity but the barrel OD is a cosmetic profile so it's not a priority. " Link
"the contour of the barrel not being "concentric" with the bore is of very little, if any consequence..." Link
"Your overthinking this issue. All bores wander to some extent. "
"How the bore runs on the ends of the barrel doesn't tell you what is happening between them. Every gun barrel made has a portion of the bore that is a little off center. Some more so than others." Link
"There is a huge difference between the bore being off center (which is very common even in some custom barrels) and the chamber being cut off center from the bore itself (which is common in factory rifles, especially Rems). An off-center bore will not degrade accuracy one bit..." Link
"it is a LOT more common than most realize. Even in custom barrels..." Link
And so on, as many different guns sites as you want to read. This thread was much ado about nothing, unless obsessing is your thing.