I had a guy tell me that if you have a little play in the wedge and it is loose, to take a piece of lead and hammer it flat, and work it in thickness, till it will be a shim. Then place it under the barrel near the back, it acts as a shim and will tighten a wedge pin. My only concern was the torque it would place on the barrel may cause accuracy problems.
In days of yore, with the wedges in shotgun forearms, the wedges had slots milled most of the way from one end to the other. With the barrel out of the way, a tack or screw was placed through the slot in the wedge, to keep it from falling out. or just getting lost while cleaning the gun.
I didn't think of this but after tightening the barrel lug my rifle shoots about 6 inches higher. So I'm assuming that if you bent the wedge and the wedge continued to unbend over time the groups would move as well. Shot 6 bullets today and at 75 yrds. they grouped about 4 inches but high. Six because that's all I can get without cleaning. 90 ff and .490 round ball.