CanisDirus, I'm curious as to what Weapon Cord BS you're alluding to.
It used to be a swift action to recover a weapon from a weapon cord, as opposed to now, where it's a move-action. VOs have told dark stories around campfires of PCs with one double-barreled pistol "dangling" from each wrist, fully loaded, with two more in-hand, and somehow that gunslinger was able to fire, "drop", grab, reload, grap, and fire something close to 12 attacks in a single round.
I never "dual-gun" with my 'slingers, and even the one I designed to shoot fast, only gets his iterative attacks (+ haste sometimes) "doubled" when using both barrels (higher % for misfire, -4 to the attacks), for at most 6 shots at ~ level 12.
For hardcore mechanics people, those are approximations above - I haven't played my high level gunslinger in awhile so the exact numbers escape me while I'm at the lab