Hornady in 120 gr. seems to be the standard go to. I'd say pretty much any bullet placed in the head/neck area is going to put them down though. Don't get too hung up on what ammo to use. It will ALL work if you hit head/neck area.
My son shot a pig with a 22-250 with a 55 gr. V-max.. The LAST bullet on earth you should be using for killing pigs, but he shot it right in the ear-hole and that pig was dead before he hit the ground. He did not even do the normal "shuffling" that they do after they are down.. He was just dead instantly.
You'll get all types of recommendations though.. Barnes all copper work well if they shoot good in your gun. I personally shoot the Hornady 120 gr. SST's. They work, just like any/all other bullets work. I do like the decisive "THUMP!!!" they make when they hit pigs though.
A hog is nothing more than a bullet receptacle.