Hopefully as that is my only goal in life.If I"m around for 15 more years, might get it done. After a bunch of cases are around, and guys are building more guns; I'm going to pick on Ruger and Hornady, who work together with Hodgdon a lot, to start with #1 the easiest one to do first, with Hornady making brass, and loaded rounds. Hornady has brass factory, and the Ruger #1 just needs heavy 585 barrel, and little weight in the butt and thick pad.. Also you mention MRC's reasonable Gibbs rifle offering maybe get them going and have the new Jamison Co make cases and load rounds, after they get rolling.
Here is overall view of the Armi-Lumar O/U 12ga that has one barrel rifled. Second is another view of the breach. Nice looking gun.
Here is picture of the 58cal Minie bullets in 20ga BPI Commander shotcup wads, and some 50cal bullets in 20ga BPI Sport shotcups. Sport wads were too small inside and to tapered inside for 58 cal. Other two are 458 bullets in a non-discarding base that had SPW, Buckhamer type slugs in them, that someone took apart, that I got. Last, 100yd group shot by Ajay on ShotgunWorld with Sav 220 20ga, with 20ga Commander wad and 58cal cast Minie bullets. Ed