Thanks for the feed back. I've cleaned the gun -without remoil but with the oil I received with the gun. The shells have been Winchester, Remington, and Kent, Federal, and BlackCloud and they all do this.
I'll try and take a picture of this and post what this does to the shell and what it looks like hung up in the chamber.
The problem seems to get worse the more it's shot. Maybe I'm missing something when I'm cleaning it?