i just tried 3 different Kick chokes, .680, .675 and .665. The .675 atterned the best at 40 yard with Wunchester 3.5 x 2 1/4 #6 putting 22 shots in the vitals and 84 in the head. I was using a hastings .680 and improved the pattern with the .675 Kicks. both will kill a turkey though.