tarawa:
I wanted a double-slugger a few years ago so I acquired a SxS 12-bore with damaged muzzles and re-regulated it for RC4 slugs.
They turned out to be rubbish on game, but it shoots the Rio "Bala Blindada" slugs perfectly.
I even killed a couple of buffalo with that Rio load.
Unfortunately availability of the Rio slugs is now an issue!
...so I'll have to work up a load for the Brenneke projectiles I have had on the shelf for years now.

But my point is:
Just regulate the shortened shottie for your favorite slug or round-ball load and keep it dedicated for the purpose. Then you can fit the sights of your choice as well, and have yourself a fat time trying to wear it out on hogs!