If you do, note this and continue the check. Re-torque the forward screw. Place your fingertip at this joint again. Loosen the rear guard screw in the same manner as the front. If there is movement, note this and then re-torque the screw.
Receiver is warped.
Barrel is grossly misaligned with the barrel channel and as the screws are tightened, the barrel is being drawn along the inside of the barrel channel. This pushes the side of the stock out and the barrel in the opposite direction. This is major bad news. The barrel is bent and is rubbing the barrel channel as above. Bent guard screw.