ORIGINAL: vadeerkiller
Thanks for the replies. Now I pose this. Most speciality ckokes in 12 gauge designed for buckshot use a .690 constriction which is extra full. Examples are the Primos Dead Deer buckshot tube and the Kicks BuckKicker choke.
Actually, the actual degree of choke is determined by the difference between the choke ID and the ID of the bore of the gun (cylinder).Bores can vary quite a bitat their maximum diameter.