I have a browning gold 10 gauge, i like the gun but it seems to have a problem with the shells seperating after ignition. I use federal 3 1/2 tungston iron in BBB,2s and 4s. At first i thought that it was the ammo, so i put a 3 1/2 inch winchester buffered lead 2 1/4 oz. this time the back of the shell blew off. has anyone had this happen to them? browning claims that it is the ammo, im not convinced of that however.