I set a benelli 20 ga this past for my wife. I took a bird with it opening week and I shot it fine. Problem is she has missed twice this week and connected with her old Mossy 935 this morning. She has had trouble with targets also with the 20. I've got a double bead on it , the mossy has tru glo sights. She says she can't see the beads lined up good enough. So has anybody put a scope on a benelli M1. What mounts will fit. Any other advice would be appreciated. She wants to shoot the gun but wants some confidence.