I do several trigger jobs and used to make my own trigger shims. I found a source of high quality trigger shims that save much time and work. They are perfect so i want to pass on this great resource, type in trigger shims, Michigan center outdoors. You should find them with google. Can not post a link but anything as well done as these should be available to all who do this type work. Even used Lance's shims in 10-22 trigger groups. Try them they help smooth out an action on my ppc revolvers and single actions.