They make big pigs. But nearly big enough to have to use a 570 Nitro on one. That thing will knock an elephant off its feet.
Re: pigs in groups, In TX they aim carefully on the first shot and then spray the group thereafter, and I think this round would have value in that it would go through a pig and hit another pig before it was spent, and I think that’s a good thing.
Sadly, it probably shoots through schools, too.
You would think that a .577 Nitro hit would blast a pig into scattered body parts.