I don't shoot a "6 string". When working up loads to find out which "group" is most accurate, I shoot 4 rounds, most shoot 3 rounds for their group. I shoot4 so that Ican seehow my rifle reacts.After I find the load that works best, I will only shoot three rounds prior to a hunt, just to make sure of myself. My system works for me, if I go to a new bullet, I do it all over again. I have yet to take more than one shot at any Elk or Deer I have evertaken.