There's no such thing as a "guaranteed man stopper"......except in Hollywood. Shot placement reigns supreme.
If you're going to have her try renting let her determine which caliber and size gun she's comfortable with. Otherwise, if she's afraid of it, she won't carry it and/or if she does, she may hesitate in a time of dire need.
Last edited by lapetrarca53; December 8, 2012 at 08:22 AM.