There are "Cliff Clavens" in every hobby. Guns, ham radio, cars (LOTS of them in the car hobbies). They all say really stupid stuff with amazing confidence. I've had a bunch of police trade in guns, S&W 4506, 5906, 6906, 4006, and a really rough on one side 4586. The 4586 appeared to be used a lot and dropped on concrete more than once. Along with those, I have had 3 Israeli CZ clones, a Beretta 92FS, and several revolvers, all S&W's of various model .357's. None of these had any really significant barrel wear, and most of them have little wear of any kind. A friend of mine has over fifty trade in guns and none of them have any important wear. The recoil spring gets changed, and the gun is cleaned and off it goes to the range.