I grew up hunting ducks on the south shore of LI, NY. I reloaded 1 1/4 oz of lead 4s and shot hundreds of ducks. We pass shot geese with #2s. A friend used a 10 gauge with #2 copper plated shot, he was deadly to 75 yards. The new heavy shot is great, even in the 20 gauge. My kids shoot 3" 20s and shot 20-30 September geese, the stuff really works, if you can afford it. You don't need much choke, IC works good in most guns. I took the 12 year old on a canoe trip last week and he missed several close shots with a modified choke. He did kill his first blackduck. Bring back the lead, or make enough heavy shot to bring the price down. Shot