Mine didn't do as well as some of the big name chokes you see on here, but it put 218 in a 10" at 40 yds.  More than enough to kill a turkey, and that was with Hevi Shot 3.5  2.25oz #7s.  But it was much better than my JellyHead .660 it only put 165 in 10" at 40 with the same load.  I'd still like to try a PG .670, maybe next year!