Was looking at the various online ammo sites today and came across some really good ballistics testing information for short barreled handguns at Lucky Gunner. The site (linked) has a great data base spreadsheet that you can link to videos of the ballistics gel tests and gives you a quick ability to compare penetration of each vendor's particular offering. The video provides an overview of what and how it was all done.
Handgun Self-Defense Ammunition - Ballistic Testing Data