Get her a .500 S&W if she don't hit it the muzzle flash will at least make everybody wish they had given up. [roll]
I agree with everybody else let her pick the gun and then take her shooting and get her trained. A revolver in the hands of someone skilled is ten times more deadly than an auto in the the hands of a idiot. It does not matter what gun she picks as long as she is good with it. [wink]