I had a Beretta 470 SxS w/ a very similar Beretta pad arrangement that I needed to increase the L.O.P on. I just plugged the holes for the Beretta pad with pieces of dowel epoxied in place, drilled new holes for the appropriate size Pachmayr pad & fitted it in the conventional manner. I'm thinking that any pad you get from Beretta is going to require some fitting to your stock anyway.