http://www.doubletapammo.com for you not so common store bought shelf stuff. The 200-gr loads are recomended for the 10mm which will be around 1245 fps. With an after market KKM barrel you could use the 200-gr and 230-gr WFNGC bullets by Double Tap.

Some day I would like to get a Glock G20 but till then my S&W 629 works very well here in NW Montana.