If this is in the wrong forum, then I apologize in advance.

I am new to shooting in general and the AR platform in particular. I have been practicing on bullseye type targets, but I have been wondering what is considered acceptable in a real world scenario when it comes to accuracy. I am using the word accuracy in the sense of how tight I can get my groups around my point of aim (I am not that great of a shot... yet!).

I suppose another way of asking would be the inverse: When does accuracy start to be considered unacceptable for a real world self defense scenario? Obviously, the tighter the groups around my point of aim the better, but realistically what should I be striving for? I may be answering my own question, but I would think it would be at least the average size of a head or torso, depending on what I would actually be aiming for in a real life situation.

Sorry if this sounds extremely ignorant. I just don't have any buddies who I am able to bounce these questions off of.