Ken, just to be the iconoclast/philistine, what about chrome lined bore with loooong forcing cones built in and Teague/Briley type long, square threaded, choke tubes fom the factory. Decreases cost if monbloc is TIG/lazer welded and decreases finishing costs for the barrels. Further with choke tubes, barrel length is much simpler. Just random thoughts since we are "dreaming". BILL