hey what these guys are saying is right on!!!!!!!!if you hit the shoulder near the socket most likely your not going to penatrate at all.the shoulder blade is a different storyyou mite get through one of those,two i dont know. unless you got gun powered behind your arrow i would stay away from that shoulder, rather hit him a little far back then in the shoulder!!!! Good luck on your hunt this year. let us know how you do out there!!!!!!!!!!