Both the 2 and 3 blade heads were full of hair after exiting the deer, this leads me to believe that they are not sharp enough. Both are extremely dull after going thru deer and I hunt from ground blinds so I don't drive b'heads into the ground. I too had a big gash in the deer I shot with the 2 blade but the blood trail was not there.
Bleeding causes death.
Sharp broadheads cause bleeding.

xbowbarry