Beretta 391 Urika last I checked is gas-operated. I shoot a 12ga in the Beretta 391 Teknys (sister gun to the Urika) and I use the 12 for goose without problem. They make shell catchers for the Beretta 391. About 1700, but it's a nice gun that doesn't fall apart easily.
Only thing I would suggest would be to keep the gas operated guns CLEAN. After 200 rounds of ATA State Trap last year my gun was dirrrrtyyy! Keep some steel wool on hand for the piston area beneath the forestock for cleaning to get the rest of the gunk/excess dirt out. It'll cement up if you let it sit during most of the year if you don't plan on shooting a whole lot. (I figured this out the hard way during the 5-Man State shoot last year.
Good luck hunting!