Any 3 arrow group that I can shoot and NOT bust a nock, shoot through a vane or robin hood one is a GOOD group...because dem a-rows be exponsive and chit......

I honestly have stopped shooting more than one arrow per dot or per 3D target, just because I do tend to be hard my own equipment. I honestly try to avoid shooting them together...but I think its just a habit to shoot for the bullseye...or the 11 ring etc etc..