Last year I went to a local range on a Saturday I'm October. The range boss was someone I hadn't seen before.
-He asked what I was shooting and I told him "a .350 Remington mag."
-He replied very dismissively "You mean a .357 magnum??"
-I repeated "no, a 350 magnum."
-He said, "there isn't any such round."
I silently opened my range bag, and handed him an unfired round. He looked at it and said "I've never heard of this."
-I said "I know you were thinking I was a dumbazz but I guess...."