What color was the blood? Dark red or light? Was the blood frothy? Was there any kind of food particles in the blood or any stomach or intestine contents on the ground. The chunks of blood sounds like a liver shot to me which a deer could go a ways on, of course I am only a bowhunter so that is what they can do with a liver hit from an arrow. But, if it was actually spraying as you describe, that sounds like an artery or lung which means he is dead close.

More info????