I have the 535 as well... Shot a pretty solid pattern with Hevi 6s and Mag Blends, and awesome patterns with Hevi 7s... I bought the Hevi-Shot choke made by Carlson's right after I bought the gun (I believe it's a .655) and the gun shot significantly better patterns with the factory turkey choke that came with the gun (.670 I think).... Like I said I just purchased the Indian Creek choke in a .665 and I'm very anxious to see how the gun likes it.