Does anyone doubt that a 357 magnum revolver is enough for deer?
'Cuz a 410 slug generates between equal and 50% more muzzle energy than a typical 357 revolver...
Seriously people, if it's enough to reach the vitals then it's enough to kill. That's the only criteria. Really.
Take a look at the cartridges of old that our grand-fathers and earlier men used to hunt all manner of North American game.... and then stop worrying about what is enough and what isn't. Hit it where you're supposed to, it will die.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.