Re: Hog hunting. Which gun to use?
The biggest question will be how you plan on hunting them. If you plan on being stationary, then the Garand wins hands down. But if you plan on doing any walking or spot and stalk method, then you'll want the AR. A headshot with the AR is what you're going to want. I go with a large group every year and the only hogs I've seen taken with a .223 have been head shots. You run into fragmentation issues with the .223 when you go for a body shot.
Personally, I own a .223 and I would never think about taking it with me on a hog hunt. The hogs we hunt are constantly moving and NEVER stand still longer than a second or two. That's just not enough time for me to get comfortable with taking a head shot.