We went out again yesterday. This time we rented a Beretta A400 Xplor for yer (pretty sure it was
this model).
Overall she seemed to like it better, but she only got through about half the stations before she was complaining of shoulder pain. I don't believe she's quite "getting" the concept of the "pocket" (I now I didn't when I first started shooting a .308 bolt action) so I think that may be contributing. It was also cold, for us, so she had on layers that I also think were contributing to the pain (wadded up material behind the recoil pad, that kind of thing).
I did shoot the rental gun for a few birds as well, and I have to say that I didn't find the recoil of the 20ga that much noticeably less than my A300 12ga. My gun supposedly weighs 7.1 lbs to the A400's 6.7 lbs, so maybe that's part of it. But that also has me questioning the logic of the SA-20's 5.6 lbs!