I didn't do this one but it's worthy of notation. I bought a 5 gallon bucket of some guys reload rejects in 223 rem for 1 cent each and planned to pull them all and recover brass and bullets to use. It was a good deal it turned out to be right around 2400 rounds
During inspection of the brass I found a 223 decapping pin embedded in the brass inside, offcenter from the flash hole! This was in a loaded round. This is the weirdest thing I have seen reloading.