One thing I have noticed is the size of the aiming spot matters! When my pin covers it, havea tendanc to move it to see the spot. On my block target I can shoot 20-40 on the smaller dots I have painted. At 50 I really can't, the pin covers the dot totally and something in my head won't let me hold on something I can't see. At 50 I have a bigger dot a shoot at and that solves the problem. Groups grow consistently as I back up.