I was reading some older posts concering crooked scope mounting holes and in particular for Winchester Model 70 Rifles.

Most of the replies seemed to imply that the only fix was to redrill the holes to a larger diameter, re tap, and then use larger screws.

What I am wondering is whether there is any accuracy issue that would prevent one from just leaving everything as is and recutting the mounts themselves so that they are straight in relation to the bore.

I ask becasue I wonder what one does when the holes are so crooked that redrilling them up to the next size or even the next size ins't enough.

Actually, using the existing holes and machining bases true to the bore as you suggest is the better, if not cheaper, solution. I have a Pre-War M70 "shooter" that had four holes in the rear bridge. No currently available scope base fit any of them. Mark Stratton machined new bases "in place" for Talley rings. The bases are a work of art. I mounted a new Leupod scope and it required only 3 clicks to collimate.

If the holes aren't too far out of alignment with each other, using Burris Signature Pos-Align rings (with or without the offset inserts) is probably the least expensive remedy.

George

Send the rifle back and make them fix it. In the age of ISO and CNC machine work this type of defect should not be accepted for any reason. Unless you push it "they just won't get it". Why is it we have all these QC standards in place ......and I've not heard of -pre-64 receivers with these problems? But I can answer my question....they have not a clue what there are building JMO