Talk:Upcoming Features/@comment-64.75.76.2-20160201150503/@comment-27279105-20160318081724

Hand Cannon is a term describing powerful pistols and not to be taken literally. From Wikipedia:

In modern usage, the term hand cannon may also be used colloquially to refer to a pistol or revolver chambered for a powerful cartridge, such as the .454 Casull or .500 S&W Magnum.

As the Lex P does some pretty high damage now, it can be assumed it's firing high caliber like a .50 Deagle.