Math: While I have no doubt your method is far more scientific (and precise than mine), I see no redeeming social value in shooting ten shot groups at a clip (even with cooling) when my established process has met my goals, modest as they might be, but it works for me.
I don't shoot them all the time either. With my sporters if I can consistently bust clay birds with a 6x scope out to whatever distance I want I'm good with it.
