I have a pretty good count on anything I have owned since new. Also what I've put down any I've acquired pre owned. The pre owned is variable that can not be guaranteed though. I don't get buying a new gun though and going to the range to shoot one box of 50. So I never believe that ! That said I have purchased guns second hand that I truly believe we're never fired.
I'm not in the habit of buying and selling so maybe that's why i don't pay attention? I dunno?