You do not need to do anything to the wedge other than SHOOT it. They self-fit with use. I use a small brass face hammer to start them when they are brand new.
wedge wasn't the problem, the base pin slot was a wee bit undersized and just a light touch on the front let me put my brass punch back in the drawer. That was the only glitch in the hitch.
I wasn't going to get any black powder guns and then in one summer besides my rifle I had 4 revolvers and am looking for dueling pistols and.....well you are right. They are like cracker jacks, you can't have just one.