Welcome aboard! The setup that works best in my 535 is an Indian Creek .660 choke with Hevi 13 Mag Blend 3.5". After a very amatuer barrel polish, I'm putting between 195-205 pellets in a 10" circle at 40 yds. But even more, as far as patterns go, my 20" circle has 354 pellets. I havent tried the 3 or 3.5" 7 shot Hevi yet, but I did try 3 & 3.5 mag blend, and the Hevi 3 - 2 - 6. With the 3-2-6 I was only getting in the 160 range. The 3" mag blend was in the 170's. I also tried the stock choke (performed poorly), and the the HS Strut undertaker. The undertaker shot slightly better than the stock xxx choke, but thought I'd try one of the economy chokes before going to the higher priced line of chokes. Good luck