Shot a buck on Thursday morning at about 18 yards quartering slightly to me. 350 grain arrow tipped with a Grim Reaper 1 3/8" expandable hit what I think was the back half of the shoulder blade. The front 6" (at best) broke off inside the buck as he ran off (no limp, and did jump a 4' fence). I'm shooting nearly 300fps at 72# (I only have a 25 5/8" draw length). I did find blood for about 200 yards with some bubbles in it, but no beds. We then began a blind search to no avail. What kind of experiences do you all have with penetrating the shoulder blade? I guess I expected more on a marginal hit with my set up.