Took my 870 12ga. with ventalator .655 and 3-17/8-6s thugs and put 82 hits in 10 in inchs at 40 yds. Then replaced ventalator with rem. super full .665 and same load and put 100 even in 10 inch at forty. Super full was good even pattern. I have a rem. extra full .687? But didn't try it. Going to basspro saturday. If you were buying, what choke would you buy? Have shot some winchester shells and put up to maybe 110 in 10" with these same chokes. Would be completly satisfied if I could reach 120ish with 3-2oz.6s. Thanks a many. cluck