"Group" and "pattern" are other confused terms novices use. Group is the extreme spread of rifle or pistol bullets, pattern is what shotgun pellets make on a target.
I hate being at a gun range shooting my rifle and some joker comes up and asks me what kind of pattern I am getting.
I know what you mean.
Correct terminology does have a bearing on determining someone else's knowledge and competency, and I do like to know how much of both other people have when they around me with weaponry.