Around Texas hogs are a problem and when out I shoot them, this means I have shot many with a wide array of calibers. I was with a buddy that dropped one with one shot broadside at about 15 yards with a Glock 9mm using Blazer FMJ. Then again I have hit one twice with a 243, both body hits, and had to follow it through all kinds of cactus and brush to get a third shot on it, to put it away. I often shoot them with a 357, or a Ranch Rife 223, cause it is what is in the pick-up, and results are usually ok, but the shot has to be broad side. I have seen a 270 fail to do much when the hit was in the shoulder area head on. But when I hog hunt, purposely, I use a 30-30 170 grain PP, or a 30-06 150 grain PP. I guess the point of all this is well placed shots are key like they always are. I definitely could see the use for a fast follow up (semi auto or lever action) due to the fact that multiple targets are often possible.