Here are a few 10 #'s from various chokes.
Hevi choke .667 - 2oz. TSS #7's = 182
Hevi choke .667 - 2oz. Duplex TSS #7x8's = 228
JH .668 - 2oz.TSS #7's - 145
Jh .668 - 2oz. Duplex TSS #7x8's - 178
GG .670 - 2oz. TSS #7's - 150
GG .655 - 2oz. HW #7's - 120
GG .640 - 2oz. HW 15 #7's = 112
Wilson Presition not to sure the constriction - 2oz. TSS #7's - 190
Wilson Presition - 2oz. HW 15 #7's = 142
Also tryed a Pure Gold .670 that would be good for wing shooting that's about it in my gun and a Carlson's .690. The both looked about the same patterns. Very open.
I am trying to figure out which way to go with the Gobbler Guns choke. All patterns are pretty even just no tight core.