Well considering I shoot most every firearm I buy as soon as I get it cleaned up and thoroughly checked over (like a kid at Christmas
) I can't say that I "found one I didn't know I had" BUT at my old age and the amount of firearms I do have I can certainly say I'm pretty sure I have forgotten a few like the wall hangers (old milsurps that are a little too iffy to fire but have some history) or some of my collectibles that even just modern black powder would make me a little nervous to shoot them (A couple of Walkers in original condition).