From Dark and Darker Wiki
< Damage scaling is out of sync with other weapons
A Common Felling Axe can be up to 45dmg, a Legendary Felling Axe can be up to 57dmg. +12dmg is not anywhere near an 80% increase, its closer to 15-20% if youre including headshot bonus its still under 30%, and if youre including headshot+phys, it still wont likely even be at 60%...