We have had rounds dropped onto gravel discharge at our facility.
If you are wanting to carry revolver rounds in a pocket, I'd suggest looking for a Bianchi Speed Strip. Keeps the primers covered and makes reloading significantly faster than grabbing loose rounds in your pocket. They're cheap as well.
my grand mother loves to tell a story about rounds left in a pocket that went thru the dryer (literaly) don't know if it is true she tends to tell stories be safe take the advise above