The deer was not gut shot. He was shot in the eye and it exited his ear. When we grabbed his rack to drag him out, we could tell his skull was shattered and it "moved around" a bit.
After he was cut open, he was turned onto his side and his guts spilled out. His stomach then burst and all the green, semi-digested food gushed out. THAT is what got me.
Well, opened stomach=gut-shot smell. My experience - and I started hunting in my thirties, ten years later I'm obsessed - my experience is that deer don't stink when you open them, UNLESS they've been gut shot, or you open the stomach. The stomach is what really, really stinks. There may be a little smell from the rest... but for one shot cleanly through heart/lungs area, they're not bad at all. A gut shot deer is the nastiest thing... when I've made a bad shot like that, esp. on a little one, I'm tempted to just leave it in the woods. I haven't, but that is a measure of how nasty trying to clean up a gut-shot is.
I've left gutpiles in the woods, to come back a day or two later and find critters have eaten all the flesh and left the stomach
contents, which STILL stink... you can smell that a good ways off if you approach it with wind in face.
Solution: place your shots in the front half of the ribcage, and... be careful of that knife while opening the deer - you don't want to open stomach!
30-30 though the lungs is best.