I believe that volume shooting in good guns is a non existent problem for most of us. Most of us spread our shooting over our extensive collections. Most of us are of fairly advanced age. I hardly know anyone in my group of shooting friends who could wear out one of their guns before they give up shooting, much less all of their guns. Even as a competitive shooter who was on the field four or more days a week, I always shot more than one gun. I'm just not worried about breaking a sidelock. A broken spring or whatever can happen on lightly used guns as well as hard working guns. I don't like searching for a gunsmith to fix a good gun, but it's part of the game.