As someone's signature says on here... "A hit with .45 beats a hit with a .22 every time. A hit with a .22 beats a miss with a .50 BMG every time." Any gun is better than no gun. Let her use what she can use. I would feel much safer if she had to back my play with a .22 she was comfortable with than a .357 she was afraid of.
'Merica: Back to back World War Champs