Thanks Greg and Researcher!!
Right barrel on my most recent Husqvarna hammer double is 0,667-0,668 and does not visually appear to be reamed. It is one of few cylinder bore barrels I have yet found on these guns. Could be factory -- that was a factory option. Left barrel is one of the 0,673-0,675 barrels that caused this query for information. Choke in this barrel is about 0,035.
Apparent barrel wall thickness in both is 0,035-0,037 inch after 20 cm from breach. Forcing cones about 2 cm long and both barrels show minor "throat erosion" for another cm or two.
Niklas
