Well I have a great turkey choke I don't even know who makes it but it shoots. I was using a full steel in my turkey gun with 21" pipe older 11-87 but I was in Gander and found this for 20 and put more steel shot at farther shots on geese but it says on the choke steel, copper, lead and Heavy shot it's a IM 705 Long range. I'm shooting geese for a bit yet.