The bighorn ram in my avitar was taken with a MA-3, along with whitetail,mule deer,and black bear. There is nothing soft about them. I can sharpen them with that arrow tucked under my arm and walking, using a file to where the MA-3 will shave hair. To make things clear....I'm talking about the older green MA-3, I have no experience with the new black ones.
I have said it before, THIS HEAD WILL TAKE ALL YOU DEMAND OF IT AND NOT FAIL!
Sharpen across two blades with a fine double cut file, back to front, rotating every stroke. When you don't see a shiny spots on the edge then lighten the strokes. I use what is called a knife file because the file is thicker on one side and thin on the other. They are made by Nicholson.
You guys that run this head down have not put honest time or experience into using it.