A few years ago, I measured handling on the Wilks O/U with monolithic barrels. It was a 6# 14.5 oz 20 bore with 26" barrels and 14 3/4" LOP. It balanced at 4 1/2" forward of the trigger, had unmounted swing effort of 1.36, mounted swing effort of 6.8 and a half weight radius of 9.55". This profile is virtually indistinguishable from a 26" bbl 16 bore W-W M-21 in the data base.
I don't know if the M-21 16 bore has "it," but I think it is generally considered to not be any slouch. The learning there is that monolithic barrels can be made to handle like assembled barrels. Not that all will be, but they can be.
My guess is that who ever figures out the econoimical machining of monolithic barrels and gets tooled up will probably wind up supplying most of the industry.
