Funny thing about interchangeable barrels - they lost their allure once I had them.
Like Cayugad and Bronko, I had GM barrels for my Renegade in several calibers and twists - .45 & .50 in fast twist LRH, .54 & .58 in round ball 1:70 twist. I ended up acquiring stocks for each barrel rather than use one stock for all of them. It's insane I know. But there it is.