I've got some of that for my Steyr, it's not really worth much as a collectible. A Destroyer carbine is in 9 x 23mm Bergmann (or 9mm Largo if you prefer), not 9 x 23mm Steyr, they are different rounds. I wouldn't interchange them. Also, given the age of the ammo I always assume it's corrosive and clean accordingly. Don't know that it is, but that way I never mess up my gun.