Sometimes I wonder about how many hogs have been killed to form some opinions. Most of the hogs in Texas are just feral hogs and aren't any harder to kill than what was killed for eating purposes on the farm. Most of them were dispatched with a .22 short.
A cast bullet in a .30-30 is sufficient to do the job and so is 00 buckshot. I think I've killed the last three with 00 buck around midnight, when visibility was less than optimal. This hog was killed by three 00 pellets in the area behind the ribs to the hams (aft of where the 870 is).
He ran about 40 yards and was found as in the picture.
BTW, to answer your question about a .357 load, a Keith 170 LSWC should be more than enough to do the job, but you could always just use a knife, like they do in Mississippi!