I’m just going off of a picture with the leg in an odd angle. I’m not going to argue because it’s speculation.In my experience that shot is usually heart or double lung.
What kind of hemorrhage was there underneath the near shoulder? Off shoulder?
If you did a gutless method you should have a pretty darned good idea of whether vitals were hit or not. Every animal I’ve shot with coppers has a massive hematoma between the shoulder(s) and ribs.