I'm having a problem with a late Ketland style lock with the roller on the frizzen. I had noticed a mark where the frizzen was rebounding and hitting the flint. When I first noticed the mark I didn't realize just what it was because at rest I can place the end of a 3/8" ramrod between the two. I couldn't imagine the frizzen rebounding that far, but the mark proves it. At first I thought that it was no big deal because they all come back to some extent or the other, but the third time this lock spit the flint out on the ground I finally put two and two together and realized that the frizzen was whacking the flint hard enough to loosen it in the jaws of the cock.
What is a fix for this?