I have a Beretta Outlander, and I love mine. I got it right before Dove season. My only advice to you is to just go ahead and get something that shoots 3.5" shells. The outlander only shoots 3" shells. I will tell you why I say that. I did a lot of research and everyone said that a 3" barrel would be fine. Well I got invited on a Duck/Goose hunt and those birds are high. If it wasn't for my friend having an extra shotgun that shot 3.5" shells, I wouldn't have got any geese. Save yourself some money and get one that shoots 3.5" shells. Instead of being like me. I love my A300, and I will not sell it, so now I have to spend more money to purchase another shotgun that shoots 3.5" shells
I'll never go on a goose hunt.
My duck hunting is usually shooting ducks over decoys so a 3" chamber is fine