Welding bases on a receiver question.

[tobnpr]

Al , so tig welding won't warp the receiver?

What Al said... and no, TIG or MIG will not warp the receiver.
Done this several times before, the HAZ is so minute I can put my finger next to the weld immediately after.
Drilling/tapping the weld can be a biatch, though.

I've also used Rocksett to secure a screw into the bad hole when it's only partially into where the true hole needs to be, grind it flush then D&T.

The receiver needs to be set up with a mandrel on a mill, indicated by someone that actually knows what they're doing. And btw, #10-32 works just fine if it helps clean up the old holes...

 

[DaveTooley]

Remington receivers are/were polished by hand. The rear bridge was rolled off on the right side and to the rear. How do I know. Swarovski scopes have less windage than elevation adjustment. After getting several back because of problems I dug deeper. The base leaned to the right throwing the ring further off to the right and the POI was to the right. Shims and precision machinist squares to get things aligned solved the problem. YMMV

 

[gunsandgunsmithing]

Several reason it could be this way but I'd set it up in a mill with a mandrel that indexes on the action face, which of course is what the bbl butts up against. But from there, it's up to you how ya fix it. I'd probably put headless screws in the holes and tig those in place, then machine new 8-40 holes. Less heat and easier to fix vs tigging them full.
But...none of that is definitely the cause, so ya need to determine the root cause and go from there. Setting things up in the mill should tell ya if the screws are really out of line and by how much, with a little math. I suspect you have a different if not multiple issues at play though.