I work in a gun store three days a week. It's a fairly good-sized store, with over 300 handguns and about 250 long guns in stock. We usually get guys like that in the store about two or three times a month. They have absolutely no idea what they have, how to use it, or what kind of ammunition it takes. My favorite was the woman who walked in and asked for some 8mm ammunition for her pistol (No. She didn't have a Nambu.). When I asked her if she meant 9mm, she got really belligerant and accused me of making fun of her because she was female. I finally explained to her that the best thing to do was to bring the pistol in, and we would make sure that the ammo we sold her was correct. She went out to the car, got the pistol (a Walther PP .380) and brought it in and handed it to me. It had a full magazine and one in the chamber.