A friend hunts pigs for pay here in by helicopter in central Texas. Either for farmers wanting them gone or wealthy types who have money to burn and want to pretend they are Air Cav for a couple of hours.
When hunting pigs for farmers, its is exclusively AR-15s shooting expanding round 5.56. You get on a herd and put rounds on the pigs. These pigs wipe out freshly planted corn crops overnight. Very costly for the farmers.
By the way, the AR you mentioned? 308 not 30/06. They dont make one in 30/06.
I was thinking of the Noreen BN36 which as it turns out is built on an M1 platform, not an AR.
Still, and AR In .308 or 7.62 x 39 would be okay too.
Dont get me wrong, I have nothing against the standard AR-15. I own one. Id just prefer a harder hitting round if Im going up against something as cantankerous as a feral pig.
Ona peripheral topic, I live in Virginia, and our hunting regs ban the use of .223 for deer hunting.