My thoughts are that pigs don't differ much, key word being 'much'. I wasn't saying that the hunting was the same, I meant the animals are pretty much the same. If you place your shot well, you can do it with something smaller than what is typically thought to be needed for the animal.
WDM Bell hunted elephants with the equivalent to a .30 Caliber rifle and figured any rifle in .30 Caliber that would shoot a bullet over 200-grains was perfect for elephants. My point being, there is no need for a large caliber rifle if a person can place their shot well. I look at like this: I hunt with a .308 rifle. There is nothing in the United States as far as wild game, that I would feel I couldn't effectively take with that rifle and that caliber if I do my job and place the shot well.
My point being, it's all about shot placement. Regardless of what you're hunting and where you're at!! All the knockdown power in the world ain't gonna make a bit of difference if the shot isn't going in an effective place!!

(By the way: "(remember there is a difference between ignorant and stupid)"... Now you're talking to me like I'm stupid. I would be willing to bet I'm a little older than you think!!)