It is ALL MARKETING to the less informed. You can kill a hog with ANYTHING if you hit him in the right spot. I shoot them with .22LR with dogs and with a .223 ball ammo at less than 50 yards in an AR15. Longer distance (up to 250 yards), I use the .223 with 64 gr soft points. Obviously anything larger will most certainly kill them dead with the correct hit.
