Min and max are accurate(...)
According to this damage calculator, my 2h hero with 21 STR, 7 PS, 170 WPF, Claymore +3 (46 cut damage), 4 weight helmet, 14 weight armor, 2 weight gauntlets, 3 weight boots, against most popular 65 body armor (50 armor + 15 gauntlets) would deal minimum 9.23, maximum 17.9 damage. Average melee player has 60 HP, so I would need 4 to 7 hits to kill the guy.
In game, just 2 hits (even without holding damage bonus) are enough to kill almost everyone with this build/weapon. There is also speed bonus, but I don't think it would basically double effective damage? Especially i'm walking backward most of the time with my 2h char
.