Well if one wates a lot of time reading the news stand gun rags one might get this idea, from those who promote the latest and greatest from someone.
The best advice to anyone hunting game with a rifle is to use a bullet suited to the job. High velocity Nitro rounds took about a 100 years for the bullets to catch up with velocity. You don't kill an animal with energy figures on paper, you kill it by either stopping the electic signals to the body from the brain or you kill it by stopping the blood flow to the brain.
Another thing that a lot of folks should realize is that exit holes, bleed well in most cases, entrance holes do not bleed much. Any tissue, organs or nerves damaged along the way speed up the kill. A bullet that expands to the point it stops or even falls apart quits doing it's job right then and there. Soft lead bullets at BP velocity expand some, but don't have a jacket or core to lose.