Biglouie I believe your deer is down, Giving him a little more time like you sead your going to do is the best thing. Most likely he is in that tall grass or not far from it. And it does sound like you got good penetration! Even though it broke off. maby when he fell to the ground is what broke the arrow off? Ether way half that arrow made it in! And thats the part that counts! Keep us informed on how the recovery efferts are going. Good luck!