ORIGINAL: BrutalAttack
A bullet that passes through is not doing it's job and is in fact wasting energy that would be much better served being expended within the animal rather thanbeing used to propel the bullet through the air.
It's the equivalent of punching a kniting needle through an egg, or smashing it on the counter.
We want lethal energy to "anchor" the animal whenever possible. This becomes exceedingly difficult to do when our bullets are passing through punching pencil sized holes and expending their energy into the ground on the other side.
A suprising number of people will argue against this. They'd also have you believe the Earth is flat.......
BS. Most big game hunting cartridges impart way more energy to a bullet than what's actually needed to kill a critter. The fact that a bullet exits doesn't in any way meanthat plenty enough energy wasn't usedto do what is actually necessary to kill, which is tocreate holes in things that God didn't intend to have holes in. In every case of bang/flop I've ever had, going back 30+ years, the bullet exited.
Honestly, I don't care muchif a bullet exits or notas animals tend to die either way. But given a preference I'd probably lean towards having an exit wound because it usually results in better blood trails, which come in handy when trackingbecomes necessary.