I hunt warthog and bush pig in the maize fields and bush. I used to use a shot gun with slugs and a 357 Mag revolver as back up. The problem is the the shotgun has 2 slugs only. When the bush pig comes for you , 2 is not a lot. Second is that the shotgun is too long to swing in the maize fields.
I now use a Marlin 336 Y in 30-30 Win with an Aimpoint red dot sight. Short and compact and 5+1 bullets.