I have shot/hunted with the original SBE for years...Great pattering gun. I also now shoot the M3500. Both guns use the same choke and I'm currently using the Trulock Federal Heavyweight choke in .650 constriction with the Fed HW 7's. Both of these guns for me are getting well over 220 in the 10" at 40yds. Have gotten as high as 249 in the M3500. Hope this helps...good luck