There is absolutely zero evidence that a Bullets energy plays ANY part in the animal dying. Period.
It is the BLOOD LOSS and NERVE damage done by the bullet displacing/destroying tissue, yes, energy was used in this process, but if you use the same energy in a non vital zone of the animal, death is NOT guaranteed, no matter the bullet size or weight.
There was a myth that the 'energy' of a 50BMG bullet passing by close enough that it would kill you from the pressure wave ahead of it, simply untrue and, quite frankly, RIDICULOUS NOTION.
There is also no evidence of Hydrostatic Shock extending past the permanent wound cavity as many believe.
The more proper term should be 'cavitation' of the bullets path where the permanent wound channel ls left behind.
The area beyond this, as witnessed in ballistic gell, is the cavitation that extends beyond the permanent wound channel/cavity only due to the water content of the tissue being stretched out and unable to compress, as water is incompressible.
If you take energy figures, the simple fact is that bullet energy is quite low, although most damage is done by velocity, the bullets energy can be just as low as a baseball being thrown at 100mph, and yes, we know this can be lethal, but that is rare.
Just putting this out there for food for thought.
Cheers.