This needs moved to the Handguns section and out of the General Rifle section.
The Glock you reference is chambered in .357 Sig, which is a semi auto cartridge developed to equal the .357 Magnum in the 125 grain offering, but in a semi auto pistol. It is a .40 Smith and Wesson necked down to accept the smaller bullet. It is most definitely not the same as the .357 Magnum cartridge. They are not interchangeable at all.
"A Liberal is someone who doesn't care what you do, as long as it's mandatory". - Charles Krauthammer