Many submachine guns prove that 9x19 and .45ACP can operate just fine in blowback operation.
Once the moment of inertia of the slide is overcome, anything larger than 9x18 requires more mass than is considered desirable in a pistol to counteract recoil. Take a look at the bolt in the UZI. It weig...
There is one correct answer to the question:
In your best Barry White voice you say "Ooooh, yeah, baby." Works every time.