Thanks Altitude! Bow was a Bowtech prodigy roughly 420grain arrow and a Vortex American Archer at 60-65 lbs can't remember exactly. It was a longer shot so I got to watch the arrow in flight and knew I drilled him good. He was with a smaller buck, and they tore off down into the coulee together and when I finally saw the one buck on the far side after going through two bottoms he was alone, and stopped.
So I knew I drilled him, found my arrow and peno was excellent. I had stood in one place watching for quite a while, and only the one buck came out. Waited another while and nothing. After finding blood it was frothy and gruesome. Wasn't worried about it being dead or not. I'm not always that confident, but sometimes it just one of those "when you know, you know" situations.
I didn't know where he was, and was really shocked he went like 250 yards on that hit. Guy just flat our boogied. He crossed through two bottoms. I expected him dead in the first one. When he wasn't there I thought oh for sure he's dead in the next one. Wrong again. Went through again and partially up the far side there where he fell.