Break shot: Increases effectiveness of Dismantle and Rend Mind to 15%.

Heavy Metal: Critical damage on lead shots DoT has a chance buff the turret's damage by 50% for 10 seconds for Rook, 20% for a bishop for 12 seconds.

Piercing shot: Increases the potency increase of ammo by 50, rather than 20 for all weapon skills.

At least, I'd like to see lead ah it's DoT tie into something!