wont help op this time but there is a thread on here somewhere
that says to tighten front scope mount screw 1st to see if it bottoms out on barrel threads
leaving scope mount loose
if it does -shorten screw till it don't
better accuracy & the ability to change barrels without removing mounts -
one member even posted a pic of a barrel swap jig he made
that allows leaving optic in place
a wooden jig & a modified nut wrench used with a rear entry action tool