when you have the scope in the right place you never go searching for the retical
the rifle should come to shoulder , turkey neck out , drop to cheek weld and your eye should be perfect behind the optic
Turkey neck means you extend your neck out as far as it comfortably goes
drop to cheek weld you cheek bone should be resting with the weight of you head approximately or just a touch of down pressure on the stock so that your face is staying with the stock through he recoil
very few factory rifles have enough rise in the comb of the stock it is common to need add something to get higher
more new guns are coming with adjustable cheek pieces but still a very small number of hunting guns.
I am tall so the rear of my optics end up almost even with the trigger
as you daughter grows you may need to change the scope location , when you have a rail you just loosen the 2 bases and tip off and back on in the new location
here is one of of my 308
my cheek rests where I made the marks all the way at the front of that stock bag , the side you can't see so well is a suede like material the storage on the side is handy because it holds 2 - 5 round magazines and the loops hold 5 more rounds. the gun is always ready to grab and go with 15 rounds
the Cheek riser bag is just one of may ways to get the eye up to behind the optic
as you can see I can just get the bolt out without taking the bag off in many cases you may need to remove a cheek riser to get the bolt fully out
that optic has 3.7" of eye relief given where my cheek is , I drew in an eye approximately where i would be
when I cycle the bolt the back of the bolt will Just touch my cheek when all the way back.