Looking for people's experience with using a set of shotgun barrels on their double rifles.

Actual experience of use, not theory.

Say what your DR is and what are your shotgun barrels. Also if the DR is set up for open sights or a scope. As also the butt stock/comb of the stock, is it set up for open sights or a scope.

How does the gun handle as a shotgun?

Probably has been asked before, but interested in the discussion anew. Thanks.