gunnut69,
I haven't fired the new slug barrel yet. It was new and a Remington factory barrel. The inside of the barrel ring was a little rough, so I used some 400 grit wet/dry on it. It's smoother now, and the parts will slide in it, but it's a snug fit. When I remove the new barrel from the action, the piston, piston seal and barrel seal remain inside the barrel ring. On my old barrel they go in and out freely. Does it need to be shot to break it in, or should I send it back to Midway? As always, thanks for the help.
Steve