Isn't this fun! For the first 10 yeras I bow hunted I actually shot them in the shoulder on purpose because that what I was taught while gun hunting. I've cut off the knuckle shown in the skeletin picture and actually had most of my shortest recoveries when making a shoulder shot. That being said, I shoot nothing less than 70# bows and most in the 80# area. Now the last 30 years I've attempted to make all of my shots "BEHIND" the shoulder and would only reccommend that type of shot for the little bows under 65#.