Fierce: If its weilder is willing to forgo the opportunity to evade foes, a fierce weapon can land tremendous blows. It allows the weilder to transfer some or all of his Dexterity bonus to damage rolls (reducing his Armor Class by the same amount). As a free action, the weilder chooses how to allocate his Dexterity bonus at the start of his turn, and the effect lasts until his next turn.
I have a Character with a 26 Dex (+8 mod), and wearing a mithril breastplate which allows a max dex bonus of 5, so there are 3 dex points not being used.
Can I use the 3 points as free damage?