I joined the NRA last week and yesterday a.m., in sub-freezing weather, went to a firing range for the first time to learn how to shoot. I kept hitting at 7 o’clock although I did get some in the center. My instructor loaned me a semi-automatic. The most difficult thing was loading the magazines - one especially was REALLY tight. I guess you get the hang of it eventually and it might help not to have frozen fingers.
Your center hits may be the result of your anticipation of recoil if the majority of your shots group at '7'. You should have the gun fired from sandbags to determine if the sights need adjustment. If adjusted and nothing else changes, most of your shots will go center and your anticipatory ones that remain will go to '2'.