Well I know most of those Texans like the .270 Winchester a bunch and up East those deer hunters favor the .308 Winchester. However, when you through the HOG part into the equation that changes the whole picture just a tad bit, especially if your going after those Russian critters. I myself like at least a 30-06 for big hogs using a (least a 200 grn.) 220 grain bullet in the Winchester or Remmington factory loads. If you handload, a good 180 or 200 grain premium bullet, like those TBBC bullets or Swift A Frames do a outstanding job. Yes they are expensive but so is a trip to the hospital or doctors office for a sliced open leg from a big sow or bore.
I myself hunt hogs with a .444 Marlin or 45/70 Marlin lever gun, light in weight generally speaking and fast to shoulder too. Not to mention those big hardcast bullets that drive very deep into flesh and out the other side. Deer or even big bucks are no problem for a .270 or .260 caliber but hogs is a horse of a different color gents!
Please don't tell me about all those piggies you or your buddy took using a .223 because I just don't want to read about snipping hogs or pigs from 200 yards. It is far better to have more gun than needed then to come up a cup short by golly. Those big sows and bores can be a whole lot of trouble in a hurry! I learned my lesson the hard way hunting with a smoke pole once upon a time and that will never happen agailn wilth out a couple of back up guns close.