Don't forget the gp100. Seemingly overkill for a 22, but it holds 10
http://ruger.com/products/gp100/specSheets/1757.html
That is WAY overkill for 22! It's neat...but kinda silly. What's next, 16 rnds in a .22 Redhawk? I do wish they'd offer .357 with the light barrel like that though.