I would go with a S&W 696 44SPL
http://lonelymachines.org/2007/09/08/sw-696/


or the old COP

This one may be new to a few of you--My buddy carries this in his store-NICE

http://en.wikipedia.org/wiki/COP_357_Derringer


If it jams force it! If it breaks it needed replacing anyway.