I don't know if this would make the gun too OP, but maybe add "Missed shots do not consume ammo" trait, if people think its too op, just disregard this
As the discoverer of Scarlet, I am completely qualified to say this chap has a point. However, I would say that the clip size only be increased a little.
Gun doesn't need a buff at all. It's meant to be a gimmick gun. You get 2 shots, 1 deleting over half someone's hp assuming you landed a headshot the first time. Like the nighthawk, it's not meant to be a BiS weapon but more of a fun/challenging gun to use. You have an insanely fast reload speed to make up for the low ammo count anyways.