A friend of mine once owned New Era Ammunition and had a client with a 2 inch 16. He custom loaded the shells and I managed a couple of boxes of seconds. They are roll crimped paper shells and the the equivelant of a 28ga load in them. I'll use a few on preserve Quail or Grouse and Woodcock and they work fine but as the company has been sold I'm only using a few each season just to enjoy the experience a little longer.