3.5 GH. bought mine to hunt with. wanted one gun to do it all from doves to geese to turkeys, etc. Main complaint is with 3.5 shells, even after an ultrasonic bath cleaning, still jams right away and every time. This POS is a joke - need to send back to Browning. Maybe I got a bad one? but for all the $ you'd think it would be more reliable and less finiky. think I'm going to a pump, works every time without fail.....