As some may recall I don't buy into the idea of a bullet "dumping energy" into a deer and thus causing shock or some other effect which makes the deer fall over. I believe, and I'm far from qualified in this area so this is merely a belief, that deer are made dead by the bullet doing significant damage to internal organs such that blood pressure drops quickly and that puts and end to them. I don't believe that doing this damage takes a lot of energy though I accept that there is a temporary wound cavity that is bigger than the permanent one.
Some time back, in a most interesting discussion we had on this subject, I expressed the view (with no science to support it) that a significant proportion of the energy "used" by the bullet in passing through a deer was in fact used to deform the bullet. Recently I've been viewing the slow motion video of bullets hitting a metal plate with some interest.
I've noticed that where the plate is thick enough such that the bullet can not penetrate it then the bullet suffers considerable deformation and, basically, stops dead. I have also seen this in events such as cowboy action shooting where metal plates are often used as targets. As the metal plate is not deformed in any significant way it looks to me as if almost all the energy involved is used in the deformation of the bullet and this gives me cause to consider that this might offer some support for my position that bullets which "dump energy" in deer are actually just using the energy to deform and are doing little or no extra work to the deer than a bullet which is not considered to "dump energy" in the deer. I'm suggesting that bullets which are said to "dump energy" are actually not doing any more damage to the deer than bullets which are considered not to "dump energy" in the target animal, they merely have a construction which causes them to deform such that this deformation uses a lot of energy.
Does anyone have any thoughts on this? I guess there must be a flaw in my logic somewhere but usually the only way to find it is to put it out there for public discussion.