I've got a win 1300 speed pump that I've got an Indian Creek bds .555 in. It shoots federal 7s very well, quite a bit better than a carlson. I haven't put an extensive amount of federals through that choke cause I've been shooting nitro through that gun for several years. The best federal pattern I've ever shot came through that choke and the winchester and I plan on using federal 7s in it when I'm out of nitros. It is really tight in that gun with the heavyweights but I have an H and R pump with invector threads and the Indian Creek preforms poorly in it with almost all ammo.