If she handles the recoil from a .30/30 carbine, a .308 with a decent pad will likely be okay for her. An 18" barrel, will be loud, so don't let her practice without good protection and consider a Game Ear or other protection in the field. Load some light practice loads with H4895 and consider 130gr X-bullets or 150gr partitions or other premium, lighter weight bullets for hunting. At the first sign of recoil-sensitivity, get her a P.A.S.T. pad. She can do this, just don't try to "make a man out of her".
Another option would be to buy a RAR compact stock and put it on a 22" rifle. I got a Hawkeye synthetic stock direct from Ruger for less than $60.
Lucky you for having a girl that likes to hunt and shoot.
Last edited by Pappy348; 05/26/15.
