Dont bother...
And you also need to keep in mind that when you crit, the bonus damage is multiplied too.
So if you choose bonus hth damage, you get 2 damage to maximum, thats an avarage of +1 dmg. But when you crit, that extra +1 damage is multiplied by 2-4.
Heavy handed pretty much eliminates effective crits, but 10str+heavy handed+3*bonus damage gives +15 damage(7,5 on average) which is quite worthwhile imo. The only suckage is that fastshot doesnt work with HtH, so heavy handed isnt really worth picking now... :/