Hi All, I have been wondering, why does it seem that in pistols, one needs to tend toward huge diameter and heavy bullets in order for high velocities to be reached? 9mm, 45 auto, even 10mm all seem to top out around 1,500 fps. It is not until cartridges like the 460 S&W Mag (2,500fps) that one can reach average rifle velocities. Besides things like the quite new 7.5mm FK, why are small high velocity pistol calibers not popular? If S&W can make the 460XVR, why cannot a small caliber 3k fps cartridge be designed? Since a=f/m and p=mv, one would think that would be much easier to do.