When I bedded my XLR, I torqued the front action screw and let the rear float. I'll bet the rear tang area took 30 thousandths minimum of bedding compound (and I'll bet it was more) and the front took zero.how did you verify that before the bedding process?
when you did bed did you torque down the action to 65 in lbs while the bedding was curing or set the action with some surgical tubing?
thats all fine and dandy, but you dont have anything to say that the XLR will not shoot better bedded or not.
i am going to check with XLR and see if they have a test to ensure contact throughout the action.