Ah, but like the revolvers people get converted to fire 9x19mm (that were originally .38s or .357s), that doesn't really shrink the size of the cylinder. Shrinking the cylinder size - by using a shorter ctg - would seem to be the reasoning behind this idea as a theoretical pocket pistol. A conversion or purpose built revolver in .38 Super can load faster via moon clips, but it won't really be any smaller than one in .357 mag.