20 gauge rifled barrel, Hornady SST sabot slugs will kill anything you wanna kill. We have killed a lot of hogs with this set up and never recovered 1 slug. They smoke and won't knock your fillings loose.
Want recoil ??? Try a single barrel breach action 12ga with
Brenneke slug.....Ouch !!!!
x2
I used to have a single shot H&R with the 12 ga Tracker I barrel (thin wall, smooth bore, rifle sights). I think it probably weighed 5 lbs. Hard plastic buttplate. With a 3" slug, it was brutal. I let a number of friends shoot it at the range. Nobody ever shot it twice.
I also had an Ultra Slug Hunter 20 ga barrel for it (rifled bull barrel). It was far more pleasant and accurate.