You can do the same thing with 9mm and pay $21 at walmart for 100 rounds. 33 round mags are readily available as well.I like the idea of a light, full size pistol that load up 20rd in the mag and very low recoil. From what I hear, reloaders really can have fun with that caliber.
Yes to both your questions. However the ammo available to civilians really limits the pistols potential and intended use(to penetrate body armer).