I usually shot the muzzy mx3 for whitetail and never seemed to have much of a problem. They blew threw any deer in its path even when you hit the shoulder. This year i switched to the magnus stinger two blade with the bleeders and was very impressed. I shot a bull elk at 15 yards and due to hitting the opposite shoulder blade didnt get a pass through. But the elk only ran a total of 60 yards straight down hill with a perfect double lung shot. I will never shoot anything but the magnus stingers from now on. They fly perfect and give you cut on contact awesome penetration from any angle.
I am a sure believer that shot placement is everything especialy on an animal the size of an elk.