Looking at these videos might give you some ideas of how to shoot PG only shotgun:
http://www.sabretactical.com/CAR/car.html
Unfortunately there is no direct example, but judging by the look, he doesn't use stock to absorb a recoil.
Disclamer:
I'm not affiliated with CAR and never recived any training from them, but read their materials and tried to imitate his stance from the video and pictures. With my Wichester 1300 it felt pretty manageable and accurate for the short distances. Even my petite wife scored a few good series shooting like that, and it was the only comfortable stance for her, because of the long 14.5" LOP of the stock.
http://www.sabretactical.com/CAR/car.html
Unfortunately there is no direct example, but judging by the look, he doesn't use stock to absorb a recoil.
Disclamer:
I'm not affiliated with CAR and never recived any training from them, but read their materials and tried to imitate his stance from the video and pictures. With my Wichester 1300 it felt pretty manageable and accurate for the short distances. Even my petite wife scored a few good series shooting like that, and it was the only comfortable stance for her, because of the long 14.5" LOP of the stock.