I don't have hogs to hunt here in VA, but I'm fairly certain a .45acp was never intended to be a hunting cartridge. Heavy and slow is good, but the acp is simply way too slow to be a good animal taking round. We choose ) or should choose) our guns and ammo according to what we plan to do with it.
Not much has happened to the acp since its inception. You can get hollowpoints and +P stuff now, but it will never be a do everything cartdridge. It was and is intended as a human stopper, and it excells in that capacity. But good grief, look how many other and better choices we have for hunting game. It would be nice to have a defense and hunting all in a 1911 gun, but we'd have to go to some other caliber, and as far as I know, a 10mm is the only such weapon available.
Is it more difficult to stop a hog or a deer? I once tried a .45acp on a deer, and it didn't work. A close shot, bullet behind the shoulder, and I did not recover the deer. The bullet was a jacketed hollowpoint. I finally lost the blood trail when it crossed a mountain top and headed down the far side.
Even considering a hardcast flatpoint, the acp is more than insufficient for large game. It is simply too slow. It's big enough, it weighs enough, but we simply cannot stuff enough powder into the short case to create a hunting round.
Even so, it will work sometimes. But "sometimes" fails when hunting ethics are a priority. As the Springfield commercial states, "Bring enough gun."