I have hit a few in the shoulder, over 30 years or so, the scapula is fairly easy to shoot through, but if ya get the joint, nothing is goin through that. Not a shot to try intenionaly and ya should steer clear of it if possible, I am shootin a 63lb bow and 600 gr arrows, zwickeys. one a couple years ago only got a few inches of penetration, maybe to the back of the broadhead, something not to be proud of, I was gonna shoot her walkin at 10 yds and she stopped when I released..hitting her solid in the shoulder joint.. kinda depends on where ya hit it..as said earlier the scapula is fairly easy to shoot through.. But STAY off the shoulder if ya can..