Just a follow up. the gunsmith showed me how to remove it. There is a metal tab on the wedge that you have to tap at an angle to get the wedge out. Comes out nice and easy once you know the trick.
So I plan on shooting it soon. I do not have a manual, but I looked in the Lyman black powder book, and it said for an 8 inch colt style revolver to use between 20 and 35 grains of FFF. Anyone see an issue with that?