I'll have to accept that as I won't possibly be able to prove or disprove it. I do know that I have a gun that has app. 10,000 rounds through it over 20+ years. Harsh, full power hunting loads mostly along with some lighter ones. This particular type of gun is known to "shoot loose" with heavy use, what defines heavy use? I am just now starting to be able to detect a very small bit of play in the joint. I am diligent in keeping the hinge clean and lubed. I also am in the habit of opening a gun every time I have a chance, both at home and in the field. The gun probably has easily double that amount of cycles on the hinge. The gun will surely continue on as built since a couple newer guns are bearing the brunt of the abuse now.

Chief