Should not have that much play, enough to move 1/4 but considering your rings are that high, anything is possible.
I had an xlr and know the finish was very easy to scuff and or scratch, may have happened before while setting up and you just noticed it.
I would put a piece of masking tape on the shroud and something on the objective (a little magic marker or pencil graphite) something that will transfer onto the masking tape to verify. Maybe your shroud is loose.