Originally Posted by
Deadshot2
That certainly appears to be a pretty large error and since it's the same with a different barrel I'm of the opinion it's in the action. I would be surprised if the action itself is threaded off axis. If so, it will take more than just facing the action as I doubt that the threads would have enough clearance to allow the barrel move back in proper alignment. Even if it did, there would be a lot of stress added at that point which could exacerbate any "heat creep" in you accuracy.
You mentioned you bought an action only. Was it by any chance a trued action with the threads cut .010" oversized as part of the truing process? Does the barrel feel loose in the action, with free-play when you move barrel side-side.
If the action was not trued, truing by cutting threads oversized will require a new barrel. The choice then becomes "buy a new action (tube only) or a new barrel".
Lots of possibilities but from this side much of it is just guessing. Good luck.