I've had this done. Be sure the gunsmith knows what he's doing and uses a mill to recut the holes and not a drill. A drill will tend to follow the existing hole.
This will work fine provided the holes aren't too far off.
Paul
You can get blank, undrilled bases/Picatinny rails, drill to fit gun screw holes.
A good smith with a mill, not a “bubba” job.
DF
