it's black cloud BB shot steel. No issues with shorter shells.Are they winchester? My maverick does this with the cheap bulk 3" winchester steel shot, but other brands or 2-3/4" all eject fine.
should I go and try different shells until I find one that my mossberg will like? is there another way to know, except selling it and buy a better brand?well now you know what not to buy ,,every gun is a little different and as you shot yours you will find what it likes and what is doesnot like ,,that's the joys off shooting ..Dutch
Try different shells. Buy a couple small boxes until you find out what your gun likes. And there's a reason mossberg are so popular. Best bang for your buck(pun intended)should I go and try different shells until I find one that my mossberg will like? is there another way to know, except selling it and buy a better brand?



























