Originally Posted by super_hunt54

Not a gimmic or theory IPSC...Just plain old physics. When a bullet opens up, it has more surface area. Energy doesn't "go away" but "dissipates". All that energy from momentum is meeting resistance. This causes the transfer of that energy into the animal in the form of "energy waves", also known as a "temporary wound channel", causing some permanent damage and some temporary displacement according to which organs are in the path (some have a lot of pliability and some have less so damge varies). According to many variables including, but not limited to, weight of bullet, initial size (both diameter of total bullet as well as meplat), speed of opening, size of opening, petal shear, retained weight, and of course speed at impact, you can have massive damage or mediocre damage. You want, for the most part anyway, to have a greater portion of that energy dumped into the animal for internal damage. As I said previously, I like 2 holes just in case you have hit one of those extra tough, don't know they are dead, animals that just absolutely refuse to go down even with an obliterated heart. Been there, done that. So I like deep penetrating bullets that, while still dumping a ton of energy into the animal, still has enough to pass through.