Looking for a deer rifle for my very petite 10 yr old daughter who only weighs about 70lbs. I know that .243 is a great cartridge, but leaning more towards .223 due to the fact that I have an abundance of it and really don't want to add another cartridge variety. Savage has a bolt-action youth .223. Rossi also has a Matched Set .223/20ga. Anyone have any experience/suggestions?