As posted in earlier threads, I haven't been to impressed with the patterns of my SX3, they were solid numbers at 40 but just not up to others on the sites #'s or up to my 870 sps. I started going over my gun this afternoon and re-cleaned the barrel and thought about putting some chrome polish to the barrel,I just could not figure out way it hasn't shot better than it has , then i looked at my IC choke and noticed what looked like a small black pin feather protruding out of one of the ports. I broke out the Hoppes and a bronze brush and started cleaning and could not believe the gunk that come out of that choke tube, it was filthy with residue and I honestly believe my #'s can't do anything but go up, I may go shoot here in a while but can't right now, Just something someone with pattern troubles might check.