FQ, the AR does work, and is great fun to do hogs with, BUTTT, if I was getting in there amongst them, then No, larger caliber and a .41 mag, or .44 mag or better for backup. I might prefer a .223 AR against a modern bolt action, because hogs can be very tough.. 7.62x39 is a good hog round, if you want to get an upper in that caliber. Running with what you have, the .270 is good medicine if you have good shot placement, but up close, your .44 might be your best friend. Not caliber, but quick action in case of a hog charge. Hogs under 200lbs are not much, but after that, look out.
If you do chose the .223, then get 77 grn bullets and shoot for just behind the ear. It works. I got mine with 55 grainers, but that was at a comfortable distance, at 25 yrds, I would have been pumping the rounds into him Big Time, and worrying.
Go do the hunt, and enjoy, here we call them East Texas Grizzlies.