Well I've been caught twice doing dumb things.
8mm Mauser out of my M1 Garand, and a 270 through my 338mag.
1st time was when someone gave me a half box of ammo in a 30-06 box only to find out they were 8mm.
Second time where I had both rifles and both were shooting nickle brass with black bullets. Had left the wrong one lying on the bench.
No harm either one, but you do end up feeling like a dumb ass.
