if you are shooting out of a real trap house and not some backyard setup, i think you would just be handicapping her with a 20. a 20 in the hands of an expierienced shooter works, for a newbie it can be frustrating.

my children both shoot, and i started them out with some managed recoil loads (12 guage) and they are doing fine. they are 11 and 12 years old. they are up to full power loads after just a few weeks and if the gun fits, recoil shouldnt be a problem...

the 12 gauge bt-99 micro is an AWESOME gun.

benelli SBE and SBE2's have short stocks and don't kick a lick. my SBE eats light ammo no problem and is a PLEASURE to shoot.

good luck with whatever you decide.
moose