i have a benelli nova that i have hunted with forthe past two years...i shoot a hastings .665 constriction...it puts 40 pellets in the head and neck @ 40 yds with winchester supreme 3.5 #5's with 2 oz. of shot...it is a head buster....and this is the only choke out of any that have been mentioned on here that you can get for 30 bucks