The first hog I ever shot was a big boar hog. He had just been shot by a guy with 00 Buck and the few pellets that hit were spread across his body. I tracked that hog and caught up to him and he was hurting. Popping teeth and all. I ended the misery with a Rottweiler Magnum slug and it knockedhim stiff legged. The butcher asked me how many times I shot him because he found 3 different types of shot in him plus my slug. He was only shot once before I got to him that day, which means he was running around with 2 other loads of 00 in him from who knows when. The only sure fire bet if you have to use shot is Copper Solid shot to the head or 000. I personally only use 12 guage Rottweiler Magnum Slugs and most drop in their tracks and only a select few have taken it and rolled over within 10 yds. No reason to take the chance unless you have to. They're the toughest things around, but why make them go through it if it can be avoided.