It is correct that buckshot is now illegal but when it was illegal 4 buck was the best killer for geese. It only took one pellet to bring a goose down and then it was time for the dog. I believe that TTT is the largest non-toxic size that you can use now days. I still use 4 buck on coyotes and fox. I use a patternmaster choke on my ten ga and just killed one coyote this morning at 83 paces. She went down in a heap and only kicked a couple times. I think that is proof in the pudding. At 50 yds I usually get about 85 to 90 percent pattern in a 30 in circle.