RE: 12ga for hogs
Do yourself a favor and take a bow along with a pistol backup. I think I saw where you are a bow hunter. On the ones I went on, on a ranch, the guys who had guns pretty well walked in, and bam thier hunt was over within an hour and they looked disappointed. As mine and my brothers stretched out for over 5 hours. And if the bow doesn't work out, you always got the pistol
But as far as 00's not killing a hog, I think he is little off his rocker. If you keep your distances under 25 yards, your going to have a dead hog. But there's alot of tasty meat you might destroy. I wouldn't do it myself. You would want to wait until they are quartering away from you.