Can't wait to see it again in action.

Thanks and yes, that history really clarifies it. As such, what you have then is a "Last Stand" of the True Big Bores made while "Big Bore" was getting smaller every day. A true transition gun and a fascinating piece of tangible history!

That deep rifling might play heck with shot patterns but...........................I wonder what a stroll over to Ballistic Products for some mylar and/or teflon wraps and wads along with buffer might make possible! Seems to me a very thick, possibly double layer of mylar and appropriate wadding might turn out some good "12 gauge" field loads there.

https://www.ballisticproducts.com/Wraps-Inserts/departments/513/

https://www.ballisticproducts.com/Wads/departments/83/

https://www.ballisticproducts.com/Card-Filler-Wads/departments/211/

https://www.ballisticproducts.com/Buffers-Mica-Wad-Slick/products/72/

I spent last winter in my bunker and on a snowy range with two shotguns and 5 barrels developing buckshot loads for regular old, cheap 12 bore hulls and NOTHING I've ever done with a gun has been more interesting, frustrating, prone to failure OR more rewarding!

{By the way, I doubt you would have much need with a Black Powder arm, but Tom Armbrust can pressure-test loads for cartridges for which he has a test barrel setup. You send 6 rounds and 30 or 40 bucks and he gives you a tech sheet with all the data back. I'd be surprised if he has a barrel that will take your ammo, but for others who might be working with standard stuff, he's done a good job for me.}

Looking forward to more "paradoxicurl" posts!