Here's a pic of the entrance wound on my Muley I shot last season with the 100g wacem. Not the biggest hole but complete pass thru at 30 yards with a 420 grain arrow going 270 fps. He didn't go far.
Well placed shot..I think that is most important. Doesn't take a large diameter head built like a train if you put it right in the boiler as shown. That said, I like a good quality heavy duty head with a lot of power behind it for that less than perfect shot.
I killed my last two elk with Wac'em 100s....pass through on a 5x5 bull, and went through shoulder blade to lungs on a first year cow. They seem to fly great, and have good penetration.
Best of Luck,
Not many people know of/use Innerloc, however, they make one heck of a tough head and very sharp out the package with .029 blade thickness... They fly great too!