You are correct. The bullet that stopped in the animal had no energy left and the bullet that exits has energy left. My point is that the bullet that stops does progressively less damage as it is slowing down to a stop. The bullet that deforms properly on impact and is displacing soft tissue as it travels displaces soft tissue all the way out in an overall larger permanent wound channel. Bullets do not have a set of brakes that they apply after they have passed the vital tissue.
As I said earlier there is such a thing as shock that is a key player in terminal performance. This more an effect of impact velocity not energy. Energy is a pretty arbitrary stat that is good for comparing one carrtidge/bullet to another. I think we as hunters get caught up in the energy figure thinking it is more important than it really is. If two bullets of equal energy but different design are fired into a deer and one blows up on impact and barely gets into the onside lung dumping all of its energy will more than likely result in a poor ending. Compare that to a bullet that deforms on impact to the desired form and zips all the way through the deer putting a permanent wound through both lungs but putting much of its energy into the ground where it stops will end in a better way every time. This is a both ends of the spectrum comparison only to make the point that it is not the energy doing the damage. My point when I say that we are subject to marketing is that there is no science backing up the energy theory. What a bullet does on impact is a function of how fast it is going and how it is constructed. Bullets can not tell how far they have penetrated and then suddenly deform at just the right rate and know how far they must penetrate to reach a deep enough track to do damage to far side of the vital organs and then stop in the hide. We have been successfully marketed high fragmenting bullets through this notion that dumping energy is a good thing. The end result is we are using potentially a bullet if impacted at too high a vel may result in poor penetration. The high fragmenting bullet hits at the right vel and completely comes apart inside the vitals will have more potential for drt shock that shuts off the cns. Shock not energy causing this result. We have been working on a low weight retention bullet line that are calling the Dead Blow Hammer. They are designed to retain about 40%. So far the results have been very good. With the pure copper the shed pieces stay quite large and so far shown to also exit. This has shown more shock without the meat damage typical to high fragging lead bullets. Will get test results on elk soon.
Steve