I think the loose receiver would have more of an effect on trigger pull then any other reason that might effect accuracy? But, if you're like me, I can't stand something to remain un-fixed, when it is desperately crying out to be fixed!
I would probably squeeze the frame, but only with a thin full length stop plate installed in the frame rail relief slots? And maybe a spacer block for the frame ears as well? I would cut it / them, about .005" under to start.. Try to squeeze it, and then check and see how much more is needed to removed from the plate to allow for adequate distance to be moved, and also to allow for spring back. Just me, on a random Sunday... OK, back to polishing drums.... best to all, til...lat'r.....GT....
