What choke did you use for this pattern? I shoot a 1300 and it shoots the federal HW #7's pretty good out of a .675 Undertaker. I am going to try a Precision Hunter .680 next. I've also tried a Carlson .660 and it opened the pattern up, so I'm thinking the .680 may close the pattern down more. All chokes are non-ported, which Federal recommends for the HW shot. Good luck and keep us posted on which choke works best for your set up.