Gunsmith Question -- I want to open the chokes on a Beretta O/U (686). They have chrome bores, right? Can I cut this chrome in a controlled way with a regular HSS adjustable reamer(piloted for concentricity?), or do I have to grind through it first with a hone,and then ream to final dimension in which case I worry about concentricity of resulting choke with bore. Anybody know how thick this chrome is, by the way, and when it is put on? My guess is bores are chromed after the choke, chamber and forcing cone are finalized. Is the chrome just a flash coat, or something thin and fairly uniform in thickness?
Thanks for any help you can provide.
