My suggestions as someone who has 4 family members of the fairer sex that hunt and do some shooting competitively as well as having lot of experience on our clubs sight in bench with small women shooters.
1. the rifle what ever it is must fit the shooter proper length of pull and the proper cheek height. Another thing to consider that is almost always over looked is the position and size of the wrist of the stock. Small women and girls tend to have small hands as well and a wrist that is to fat to get ahold of will be a problem.
the shooter should be able to shoulder the rifle and lean forward (standing with the off hand foot about a foot forward of the other foot. Leaning backwards will always lead to increased felt recoil. As well as making it near impossible to put up a good second shot.
To best fit a small stature person first do the length of pull. Place the butt of the rifle in the pit of the elbow then extend the finger to the trigger. the trigger should land about the middle of the joint below the finger print.
Once you have this measurement you can subtract the thickness of a recoil pad (the Pachmayr pad that are a gel have been our favorite) cut the stock to fit this measurement make sure the cut is square. Then fit the pad and shape to fit. A gunsmith can easily do this for you or if you happen to know a Custom knifemaker in the area They can fit up a pad using their belt grinders to do a very nice job.
Then make sure her hand comfortably fits around the wrist with the finger print if her finger centered on the trigger.If not then the area should be reshaped to suit.
Once the butt stock fits the shooter then with the scope mounted (use the lowest rings that will allow the scope to clear the action and the barrel) have her on a bench (so shes not holding the weight of the rifle) hunker down on the cheek piece and see if the Iris in her eye lines up with the centerline of the scope. If not take a wash cloth or piece of ensolite pad and raise her cheek until her eye naturally falls at the centerline of the scope. This will show you how much the cheek piece needs to raise. Smaller women have smaller heads and smaller faces so they need more height to reach the scope centerline.
You can get some Kydex adjustable cheek pieces that can be put on almost any stock wood or synthetic.
Like this one http://www.tacticalworks.com/tacticalblog/just-added-karsten-cheek-piece-b-model-installation-instructions/
Once the stock properly fits the shooter her enjoyment level will skyrocket.
2. caliber is much less a problem when the rifle is properly fitted. .243Win, 7mm-08, 300sav,as well as a dozen others all are reduced recoil compared to a .308 .270 30-06 etc.
3. Barrel length really nothing longer then 20" is of any advantage for most deer hunting.
4. Optics make sure the scope has decent eye relief few women like getting wacked in the forehead by a scope in recoil.
My daughter who is almost 5' about 118lbs has her Expert badge for shooting M16/M4 in the Navy. She can outshoot her husband with her .22 and is amazing with my M1 carbine shooting to the very limits of the gun.
My wife used to place in the top 5 shooting her .50 cal muzzleloader in mixed company at Black Powder Rendezvouses and made a lot of guys angry in the process. Her rifle was built to fit her.