Went to pattern my gun today with the Nitro shell but had a problem with the shell ejecting.I have a new Mossberg 500 pumpbut every time i shot the shell it got stuck,couldnt eject it.Had to take the barrel off to get the shell out every time.I shot the Winchester Xtended and another shell and didnt have that problem.

Anyone have this problem? or any info you could give me to fix this problem.

Thank you
Artie