Since you didn't enter the body cavity, you probably just hit muscle and bone. How did the deer react after being hit. Did it act as if you had broken bone? I think you would have known if you hit the shoulder blade because you would have heard it. So what I am thinking is that you probably had a muscle hit, which probably will not kill the deer. The bright red blood with no bubbles in it is normal for a muscle hit. Doesn't mean you shouldn't give it your all in finding him though.