1300 fps Larger Pellets work great , I would favor BB's ,BBB's or T's !
It's a special application as the larger pellet retain velocity and carry more energy to the impact zone !
Like what's been said , pattern a few as it (normally) takes less constriction in your choke to pattern well !
LM (.015) or Mod (.020) patterns good for me !
I never really cared for those slower loads shooting geese with 2,s & BB,s. in 12,s. Shooting factory mod. chokes they'd work inside of 30 yds. but just didn't seem to kill well much past that. Maybe better choking would have made a difference but those were back in the days prior to selections we've got now. All the difference in the world when I tried the first 1450FPS loads which if I recall were the original Win. BLK. Bx Supremes years ago in 1 1/4 oz. 2,s. I,ll take a load at or above that 1400 threshold in steel everyday compared to those slower loads.