Quantrill,
Actually, while the 400 will fire 9x19, it's not designed for it. The gun is really designed to shoot 9x23 (9mm Largo), and .38ACP. Although .38Super is the same size case, it is too high pressure to shoot in the Astra. From what I've been told, if you shoot much 9x19 in this gun, it'll ring the chamber and screw it up for the proper calibers.