I guess it depends on where you are hunting & the terrain. I'm in Central Florida, and the occasions I've been hawg hunting have all been in swampy areas where a "real" rifle was not the #1 choice. I'm not much to sit in a stand & wait for something to walk up, so we stalked them carrying shotgun or leverage action rifle. Light weight, something you don't care if it gets muddy or scratched up.
Funny story, I was out one time with two fellow Marine buddies of mine hunting in a swamp with shotguns. We had split up to cover more ground when we heard a herd coming through. I saw them moving through the brush but couldn't get a clear enough shot, but they were headed right toward one of our guys. I heard the blast pf his Mossberg, then the sound of a raging squeal, then "Oh #uck", then the crack of a pistol twice, then silence. Intrigued, I ran over to see what had happened. After the initial shot, my friend ejected the spent round with his pump Mossberg, but when he tried to chamber the round the forks came loose from the fore grip. The 150 lb boar was badly wounded but really PO'ed so he was rushing my friend, who frantically took out his .45 backup & was able to nail the hog twice in the chest to bring it down.
So, the morale of the story I suppose is 1) carry a good firearm, 2) plan on Mr. Murphy hunting the same ground so carry a backup to whatever you choose as a primary. I am a Remington man since then.
Happy hunting.