Alls I can say is William at Sumtoy custom chokes is a great guy and will work with you to get your turkey killer to shoot the way you want it
! I got one of his chokes and pattern'd it a couple weeks ago ! The first time out was 31degrees . At 40 yards I got 238 in a 10 . He told me to clean clean my gun with 4ott steel wool on a cleaning rod thats attached to my cordless drill . I put some wd40 on it and cleaned her up . I would like to mention that I only ran a couple dry patches down after cleaning . So , I went out a few days ago when it was 54 degrees and got 218 . So I called william and told him the results . He asked me if I had used alcohol to clean the excess oil out and I hadn't . So , today I cleaned it out and there was plastic from the wad all gunked up in the barrel and choke from the excess oil . I wen't out today 56 degrees and shot a 292 in a 10 @ 40 yds . Pattern's a little too tight for me because 90% of my pattern is in the 20 . In my picture if I had centered my 10" circle i would have had a 300+ count and that would have centerd my 20 as well . William is sending me a 655 and 660 to see which one i like better to open up my pattern a little . I might keep this 650 incase I hunt any fields .
SBE2 / heavy 13/2.25/7's with Sumtoy .650
292 in a 10" and 190 in my 20"