[@Prince of Seraphs] Quick thing about your two pistols, since its bothering me.
22mm doesn't exist, and 45mm is an anti-tank shell.
I think you mean .22 and .45 Caliber. No big deal, it was just bothering me. Here's a chart below to help you out with smaller caliber bullets and shells.

[url]http://guns411.com/wp-content/uploads/Complete-Rifle-Ammunition-Guide-Comparisom.jpg[/url]