Not sure they even make them anymore but I have a Drury Brother's Madd Maxx .665 choke on my 870 Super Mag. It patterns 3.5", 2 oz, 5 shot, Win HV Supremes so good out of my 870 there was no need to even try any kind of hevi shot. I don't shoot a circle when patterning a gun I shoot at a head and neck turkey silhouette. I don't care how many pellets is in a circle but I do care how many are inside of the head and neck silhouette.