Although i'm totaly deaf in one ear, i'm going to try turkey hunting this year. My problem is not knowing what choke to buy for my .12ga. Rem. 870. There are so many on the market as well as shot size and brands. Whats the difference between Tky. Ex. Full, and Tky.Sup. Full ? I see Cabela's has their own Hevi-Shot choke tube for $29.99. Would this be a good choice ??? Will appriciate any help you guys can give me... Thanks.