RM: I think you better re-check your math and reasoning. I have never owned a gun with a hinge pin as large as 0.50". I would think that most of mine are 0.375" or less, and the bearing area cannot be wider than the hook. Also, the hook cannot bear on over half the pin diameter, or you wouldn't be able to remove the barrels without removing the pin. I don't know what other makers used, but the pin in the LC Smith gun is a taper pin, according to the drawings. Also, most guns that I am familiar with have a portion of the barrel lug that bears against the frame and will carry part of the load if properly fitted.
Last edited by Tom Martin; 05/31/13 10:36 PM.