If you don't life steel jion the club there are several choices that I have used
Fed tun. iron Good stuff but $$$ and the payload is light DO not use your full
Kent tun.matrix good stuff not cheap but shoots just like lead ,need to choke like lead ,your full choke will do good 5 for duck and 1 for goose
Rem. hevi shot GREAT stuff harder than steel heavyer than lead , not cheap, I would not shoot this out of your full ,I shoot CYL. or IC for decoying ducks and geese, to mod for long range. your full will shoot way to tight ,Rem load 3" 1 1/4 6 or 4 for duck and 1 3/8 2 for goose
I reload hevi shot ,I shoot 6 or 5 ,1 1/4 oz at 1550fps for ducks and 2 ,1 3/8 oz at 1550fps for geese. With a Brily light mod extended choke 70 yd geese are easy with pratice, last goose 7 #2 pellets thru it at 75 yds
I load 1 3/8 oz of #BB hevi shot at 1550 fps for coyote ,non have needed more than 1 shot out to 75 yds saw fur blow off the back side