The 10mm Auto is actually a fine cartridge. It can be loaded to 40S&W or 357 Magnum-level (some would argue slightly better) with 135 to 200 grain bullets. I think some may even load 220-230 grain lead bullets as well. I like the Glock 20, but have fairly big mits. The G20SF is also available, as well as 1911's from Kimber and Dan Wesson, semi-auto's (10XX series) and revolvers (610) from S&W, and the Witness series from EAA (beware). My favorite is my MP5/10. Ammunition isn't common in stores, but can easily be found on the internet. It is more expensive than other calibers, so handloading can be helpful.