I know of a website put out by some guy that work for, let's see, is it Premium Hunting calls?

Or maybe it's called Prime time Hunting calls.

Oh, it's called Primos Hunting Calls!

Anyway if you look them up online(I think they might have a website, I wouldn't bet on it) they have one or two videos of themselves shooting elk with Bows and arrows! They must be strong to shoot something as powerful as a 30-06! Oh, and I do not know of a single instance where they lost the game due too poor shot placement or inadequate knockdown power.
In short, if you shoot it in the right spot, it's dead.