The AR-15 is not the best choice for Pigs (Hogs) with a 55 grain bullet.
Most hog hunters I know carry a .308 or a 7mm-08.
Be well.
Want to know how I know that you do not know a whole lot of people who have been in the business of eradicating feral hogs?
He will never respond.
I haven't met a hog yet that likes a 5.56 round yet...lol.