can felling smash been used during an charge action?
it's a full round action that generate an single melee attack so it should be and i should have the swift action free
Felling smash:
Prerequisite: Int 13, Str 13, Combat Expertise, Improved Trip, Power Attack, base attack bonus +6.
Benefit: If you use the attack action to make a single melee attack at your highest base attack bonus while using Power Attack and you hit an opponent, you can spend a swift action to attempt a trip combat maneuver against that opponent.
You must use an attack action wich is a standard action. Charge is a full round action. You can't do both in a given round.
Just walk up to the creature, drawing your dueling-pg weapon, and hitting it works.