First off, hogs are not bulletproof. I used to hunt them with 30-30, 44 Mag, 11X60mmR, 8X57mm, and 7X57mm, and had friends that used 60-caliber muzzleloader, 12 ga, 357, 30 Carbine, 223, 243, 308, 30-06, 7mm Rem Mag, etc. They dropped just as quick with a good hit from a 30-30 or 44 Mag as they did with a good hit from anything else. I can also tell you that a hog hit in the head with a 30 Carbine will just lay down, the same as I can tell you from witnessing it that a 7mm Rem Mag through the paunch will not anchor a pig. Shot placement will always win out.
Never try to educate someone who resists knowledge at all costs.
But what do I know?