I have the 1187 supermag and I use the Remington Hevi-shot 3" 1 5/8oz #6 and a Hevi-shot .665 choke.At 30 yards the pattern is the size of a sheet of notebook paper.At 40 yards it' s about 24" round.I know some people don' t like to use #6 but I have killed 12 turkeys ranging 15 to 60 yards with #6" s.The 60 yard shot was with the Hevi-shot Remington #6 it was stupid to shoot at that distance but I just got caught up in the heat of the moment and realize the distance.