Worrying about foot-pounds is all well and good, I guess, but it's just part of the story. Penetration with controlled expansion is more important, as long as the muzzle energy is somewhere near or a bit above the legal requirement.
SFAIK, in thirty-caliber, bullets of around 120 grains are designed and intended more for varmints and/or thin-skinned game. Hogs are thick skinned and heavy-bone critters.
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