4 rounds.
Federal factory 327. Couldn't eject them. Had to take the cylinder out. Thought t was odd but didn't notice anything out of the ordinary when firing it. Had brought other guns so I set it aside. When I got home and started cleaning I saw that the barrel on the underside had burst open.....
Guess I'll be calling Ruger and federal.
Edit: there was metal blocking the ejection rod. When the cylinder was removed the cases fell out.