I think with newer bows shootin 250 +++ feet per second, anything under 20 yards can't get out of the way completely. When I am thinking that I may have a super alert deer, because it saw me or whatever, I aim at the heart. Like three inches above the white line of hair. That way if it drops I'm OK if not I'm still OK. I only shoot 209 on my older bow but that works for me. My son missed a doe last night because she was alerted and he aimed as he normally would. She easily got out of the way of his 168+- feet per second bow.

Greg