RE: shot placement from above
I'll disagree...
The buck I killed this year was ALMOST straight down. He had walked towards me, under me, then as he was walking away he turned ever so slightly. I hit him just to the right of the spine about halfway back and the arrow came out between the front legs. The 1 1/2" cutting diameter of the Spitfires made an exit hole the size of a small apple and the sucker bled like you were pouring it out of a bucket. Because I didn't hit the spine, I figured one lung at best so I gave him 2 hours. I never had to slow down to look for blood and the deer only went about 120 yds. As suspected, I only got one lung but I cut the artery going to the heart. The deer was cold and stiff when I found him.
I have taken several shots like this and have found all of the deer I shot like this. But as someone said, you better be confident in it because there is little room for error.
I'll take every shot like this, every time...