Excellent topic Mike.
I agree with all of the above... As hunters we're not just concerned with killing, we need to recover the animals that we shoot. Most of us would prefer to miss cleanly than kill an animal but not be able to recover it.
The moment that we find our quarry dead is the emotional high point of any hunt and one of the highest "highs" that we can ever experience... Unlike the moment we realise that we have wounded or killed an animal but have lost it for good, which is the lowest of "lows".
Shot placement, shot selection, and pass through penetration all play critical roles in determining the outcome.
I have come to the point where I only take broadside or very slightly quartering shots because the heart is too small of a target and because we need to take BOTH lungs AND have an exit hole in order to limit the distance that an animal is capable of traveling after the shot, and to ensure that there is a lot of blood to follow.
The other critically important aspect of recovery and heavy blood trails is the importance of an extremely sharp broadhead... no matter how many blades it may have. Even though I'm a devout two blade guy, I'll take a razor sharp three or four blade head over an "iffy sharp" two blade every time, and vice versa.
I read somewhere that a double lung hit animal can only live for 90 seconds. Well, on a dead run they can sure cover alot of ground in that time! Even animals hit perfectly can be lost if there's not enough blood to follow them.
So for me...
Broadside double lung hit + sharp broadhead + full penetration = Steak and eggs.
Ron