Are there any 9mm wildcats, and if not, why not? There's bottlenecked pistol calibers from .25naa (.32acp necked down to hold a .25acp bullet) up to .440corbon (.50ae necked down to hold a .44mag bullet), but I don't recall ever seeing any 9mm wildcats, which I find odd since 9mm is the most popular caliber. It'd be awesome if someone would neck down the 9mm to .308" and make conversion barrels for it for glocks. I've been thinking about getting a G20 eventually just because of the ability to convert it to 9x25dillon. I imagine a necked down 9mm could probably get pretty close to 7.62x25 velocities, and still fit in a standard magazine.