LOL. It's a pure fluke. It's "a group" alright, but part of a ten round magazine fired at that POA. Some of the eagle eyes may have noticed the other hole at 11 o'clock, nine inches from centre. That was the next closest shot in the group. Overall it was something like 4 MOA; still surprising given the wind when it was shot.
Just so happened that 3 of the ten rounds happened to cluster like that. One of the damndest things I ever did see in all my years shooting. It's a three round group at 300 alright, if you disregard the other seven holes around it LOL.