UB,
I aim for the center of the intended mass as long as that particular shot is presented. Frontal chest, center shoulder etc. I take head shots only when thats all I have to work with at the time. Coyotes, fox etc the game remains the same for me as far as where my aim points are located. More than everything I fully understand my weapon system with its capabilities as well as mine. Knowing the weapon and shooting fast (flat) like I do definitely takes out some of the margin of error when under/over estimating ranges.