That choke is tight, try some 6s, mine shot any heavier than lead 6s fantastic, fyi that is a 100 dollar choke so keep that in mind on trades. Longbeard 6s would work great I bet if you could find some! Mag blends would do well I think but the flight control federal stuff will not. Have you checked poi at close range? I shoot at like five yards and make sure it is shooting straight!