My wife single shot Ithaca M66 12 Gage 3" Full Choke broke in half at the receiver. We were using Wally World Federal bulk 2 3/4 #8 shot when she noticed the gun open and ejected the shell without here releasing the lever. Second shot it did the same. The the barrel fell off. I never scene this happen before with a single shot I was magnum rated gun so low powered loads should not have been an issue. She ended up finishing with my friend Browning auto. We are now looking for a Browning auto for her. I told her we need to get two one for me. '