Rex, I can't tell you how many of these action have scope mounting issues. The rear bridge contour is incorrect and needs to be recontoured for a base to sit correctly. Both of these had bridges that were higher on the left side causing the base to tilt to the right (as viewed from behind).
Mine is a .308 with the original length mag box, not altered to be longer. It shoots well as is but I have often thought what a great action that would be for a long-throated .284 Win.
I will take a close look at the scope bases' relationship to the receiver on mine. Thanks for that info.
Cheers,
Rex
