An AR-15 would be a good choice if it is legal in youe area... Get a good round such as Hornaday's American Whitetail... If .223/5.56 is too small, another option is the AR-10 and its variants... Again, a good .308 WIN cartrige such as Hornaday's American Whitetail would work just fine. If it is that AR's are illigal, or out of your pricepoint/budget, look at the Ruger American Rifle, .308 WIN would be a good choice, if that has too much recoil for her, then look at the just announced (as of today, 1/3/14) .223 REM variation of it... The nice thing about those, is that the action is nice on it, it shoots really well, and it is really affordible (around $199-230ish new). If you go with the AR-15 get Nikon's P-223 scope, and you cannot go wrong... With the Ruger American, if you go with the .223 version, get the P-223 scope. If you go with the .308 version, get a Nikon 3-9x40 or 4-12x50 scope, and you will have a nice platform for a hunting rifle.