I bought a DT10 from a TS.com member yesterday! I am measuring the chokes that came with the gun but without the knowing the bore diameter(No, I do not have a bore mike) I do not know what I have! I could not find it in the manual!! Can any of you tell me what it is supposed to be so that I have a starting point! I will get it measured but I can't right now! Thanks, Tom Rhoads