If you are right handed, it appears that you need less cast in the stock. I don't know if those extremas come with shims like some of the benellis do or not, but it seems that your head/eye is lining up too far to the right of the bore... having your head too far/not enough over is the main cause of patterns that are not true to center.

Are you shooting from a bench or sitting? Or are you standing up and mounting the gun quickly as you would in the field?

Just a few thoughts before you send the gun packing so close to the season. Hope it comes around for you, the pattern doesn't look to terrible, just the placement of it.