
Funny use: in a Tony Morgan deck, hold your Colts in hand as long as you don't need them. Once you do need them, use Robert Castaigne to shoot as a fast action and then play both for the price of a single one and without spending an action.
And the cherry on top is that if you had put a bounty from Bounty Contracts on that enemy and you killed it with this shot, you regain it and now have 6 bounties and 6 ammos.