I read somewhere that an Army MP stationed in Germany in the '70s asked a German policeman why they carried 7.65 (.32 ACP) chambered Walthers instead of the 9mm Kurz (.380) version. According to the cop, 7.65 penetrated car doors better.
If I were required to carry a pistol of that type, i would seriously consider a quality 7.65 pistol loaded with Euro-spec ball ammo. More penetration, less recoil, possibly more accurate, and one more round in the magazine.