Your base headshot chance is 25%. I had a brother with Brute (+15% damage to head), flail in his hands and that perk, a lot of hits to humans and orcks without helmets or in cloth headwear were just oneshots. And remember, noble houses units ofen doedn’t wear helmets but have shields, and flail is good agains shields. So, this perk is more of a situational, if you have weapon with good bonus to hit head (like unique spears with +11%) and want to boost it even more – here you go.
