I'm ambivalent of 9mm revolvers due to problems with binding cylinders due to the tapered 9mm case backing out and jamming against the recoil shield. Others have had no problem with their versions. If you have one that works fine, 9mm makes the most sense, but you'll likely make a safer call by going .38sp/.357mag.
Jennifer tilted her head to the side curiously.
She heard the sound of a rickety-wooden roller-coaster in the distance...