lone_hunter
I went through this quest with THREE Daughters. I shall NOT go against any MM'ey members post or suggestions. If I were to give you help, I would first need to get to know YOU DAD and how much time, every day, you will devote to her possible success. Next I would need to know your Daughters TRUE Interest(s) and if she wants to really do such shooting things or if she is under any pressure.
I am not insinuating bad things, simply drilling down to core components within two individuals.
One step is to find an old gun stock with no metal. Use scrap wood and mount (Tape on) a scope. Have her use the scope every day. It should be held in a low gun (Hip) position and raised to a shouldered-shooting level. There's a million variations of this but the key is discipline in training + fun. Set a prize out at some distance you feel will be easy. It could be a $ Bill. As she becomes more capable (without knowing she is training) in this game, hiding the prize becomes a challenge. In time she will have a stack of money (Paper $ or coins) and She will have made a giant step in happiness with Dad and the abilities, for Life, in the easy instant use of a scope. This is why I mentioned devotion.
Ruger makes a Muddy Girl and at gun shows or Internet sales, maybe locate a Remington 600, 660 or Model 7.
Cartridge & Ammo. If Dad reloads this is great. If not, find someone that does. The first goal is to have light loads with cast bullets with Trail Boss Powder. Let her shoot 100's of such cartridges all summer. Resist Hunting ammo. Fun is the key. Bear Creek Bullets in California have Moly Baked into the bullet and I have never had lead issues. Yet I still clean the bore's to insure such. I would always lean towards a 243. It will, if all is approached with fun, stay in her life; Forever and have good memories with Dad and his patience.
Cast bullet loads as described have near zero recoil and for a young girl, it is pure enjoyment for her to have a bench set-up, a target at 25 yards and she later brings Home the target with cheers to show Mom and everyone. Dad's have a tendency to speed up everything. It has been difficult to explain to even close friend, slow down Dad.
The rest will take care of itself. This includes off-hand, kneeling, sitting, prone, etc...
For me, this is as brief as I can be when the subject is so sensitive: A Daughter or Son.
Jagerdad