After about a dozen more times of running brass hull number one through my sizer. It still would have to be pushed into the chamber. I removed the barrel and kept taping the hull on and out with a cleaning rod making note of the shiny high spots where it was rubbing in the chamber. I took a piece of 400 grit sandpaper and rolled it around the shell and gently spun the case on the sandpaper pressing on the high spots. After about an hour of trial and error it fits in and I can gently remove it. Three more to go.
