If she is shooting from a shooting house install a rest with sand bags and take the shaking out of the equation.
I ordered these earlier in the year, along with a $5 bag of bird seed, and you have a good set up for a shooting house.
http://www.amazon.com/gp/product/B00162QGCW/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
