I had trouble with that spine shot from the back last year...Had him all lined up at 25 yards facing away. Pulled the trigger and the arrow deflected off the crazy backbone. It went about 200 yards away and met up with another tom. They both strutted on top of the hill until they flew onto the roost. When I finally found the arrow it had some fat on it, but no blood. I think the back shot is no good. The front is ok though. I have shot one from the front and it did the trick. The best shot I think you can get is broadside if you are on the ground...and from the front if elevated above the bird (this way you can tuck it in just above the breast and into vitals without hitting the meat).