I watched Mr. Rowe's video. I understand the idea of forcing the fore end iron into the knuckle. I would try that except there is no fore to aft, (horizontal)or vertical play in my gun's case. The play is side to side and slight, one of those things that isn't causing a functional problem, just annoying. I thought about peening the barrel stop to tighten it up in the action. I'm reluctant to do that without some study. I would like to get the barrel stop out of the action and have a look at how it is fitted. I have another gun that I can remove a screw and get the barrel stop out. This one has no apparent easy way. Maybe the hinge pin has to come out to get at it?

Thanks for the responses!