Re: .308 or 30/06
I've been using a 308 and my dad has been using an 06 for the last 25 years. I can tell you that save for one deer, I have not had to track any that I have shot. Like DGD said, bang flop. I actually stood there slack-jawed when my big buck went running off... 15 yards. My dad on the other hand has only had a few drop in their tracks, and those were the ones that he tapped in the head. All the rest have run, 50 yards up to 200. And most all were double lung shots.
I love his gun, it's a pre-64 mod70, but I don't think I would ever want to take it out. Deer hunting with my 308 is nothing but work. Shoot and then it's time to gut and drag.
Remember, shoot straight and shoot often.
Good... Bad... I'm the guy with the gun.