The first several rounds fired eject as they should but as the barrel/cylinder heat up, the cases bind in the cambers and will not eject without the help of a light tap with a smith's hammer on the ejection rod. Only two of the chambers expand enough to cause the problem. I don't trust myself enough to use a finishing reamer but I was thinking about using some medium grit lapping compound on a mop (chucked into an electric drill) and see if that might solve the problem. Is this a good idea?