I got the same gun and just from my experience, to make a 35-40 yd gun (WITH A 20 GAUGE) you have to shoot HW or Hevi-13. I tred some lead loads and they were not real good. I had real good luck with a Tightwad Choke with Mag Blends and Hevi-13 #6, and had real great luck with Fed Hw #7 and a Truglo SSX choke! I get 150-153 with this setup at 40 yds. in a 10 inch. I tried various chokes and all lead shells and could only achieve around 50-70 in a ten ich at forty, at 30 yds all seemed awesome but the lead past 30 really fall off!!!!!! I hope i helped good luck!