Bullet placement and bullet construction are much more important than caliber. A properly constructed bullet properly placed from any of the guns you mentioned will put a hog down. On the other side of the coin, improper placement or improper bullet construction can get you hurt on a big tough hog.

As was said above, most people use way more gun than they need. I have personally killed more than a hundred 300+ lb hogs with the lowly 30-30.

Just buy the gun you like best, use well constructed bullets, and practice enough to be able to put them where you want them.

Bill

P.S. A nosler balistic tip is not a "properly constructed" bullet when hunting hogs. It is fine for deer, but use dangerous game bullets when hunting hogs, you are, after all, hunting dangerous game.