So I bought my son a Mossberg 500 Super Bantam with a 22" turkey barrel on it last week and changed out the X-full choke with an Improved Cylinder choke and tried to sight it in with rifled slugs and after 3 shots, the end of the barrel split about an inch. Does anyone have any ideas as to why that would happen. I can't find anything stating that barrel can't shoot slugs as long as the choke is an I/C at a minimum. Lucky we saw the split and no one got hurt.