Do 30's have more fun?

[unspellable]

It's true that 7.65 Parabellum factory ammo is often underloaded. But that's the fault of SAAMI, the factories, etc., and not inherent in the cartridge. Given a proper load and recoil spring the 7.65 will feed wadcutters and I'd be surprised if that would work with a 9 mm.