Hello you should have had some info in with the call if not maybe try BASC as they do course's & would help & open your eye's to it.Heavyshot is good advice especially on high geese & i would use No.2-1 & BB's for high bird's.If decoying or know they will be quite close then i work 36g No.3's.Lead depend's on person & hight/speed/distance of target.