First off I think you have been given some really good advice. ZEE and I have talked VIA PMs about this, and I will offer up some of the same info. And BY the way,, The JURY is still out on this one. The buffalo bore sounds like it would do the job, but I think that you are going to have to stick with medium sized hogs. We have seen this cartridge do good on deer and there was even a guy on YouTube that shot an Elk with a Glock 21... But lets talk only about Hogs. Bill Wilson lives in Texas and has for several years. Yes the same one of Wilson Combat. He uses 230 grain XTPs on the hogs that he shot. The load he was using is not a +P load and it clocks around 940-950 FPS from a 5" barrel. Now, I know someone else who has used the 45 ACP and said the Federal Hydro-Shok worked best. Shot placement is the KEY HERE!!! We have discussed this use of hollow points VS solids in Cast. I don't want to go there. Stay away from a shoulder shot. Forget the Behind the ear. In the neck is the best for shooting with a 45ACP Look at a photo of the Anatomy and YOUR shot should be nearer the body. The is a larger area and is important since a HOG is almost always moving. Remember if you are taking a shot offhand you are also slightly moving. SO DON"T be afraid to take a shot. This area is much better for the ACP or any smaller caliber either rifle or pistol. With a neck shot in this area you will penetrate more and should break the neck. This will drop that Hog DRT. I have seen big Hogs run with both legs broken from a shot. Lung shots will allow them to run. Break a neck and they drop. On the +P Loads,,, If one was planning on a steady diet then a change in springs is the best idea but an occasional shot will not hurt one of the colts or semi custom 45s. A cheap investment is some buffers. Wilson Combat sells then and I use them in my 5" Guns. This helps with heavier loads. The buffer helps to keep from slamming and beating up the gun. Steady diets of +P are hard on the link too. Won't be long before one has to replace the pin or link too.
I am not retired yet and so not have a target rich environment available right now. But If I was able to test my gun and some ammo I would do it regularly. I would. I do encourage any of you to practice with a specific load and become proficient enough to Post your exploits here. As we all know that just one or even 20 hogs killed with a specific caliber or load is not a answer all deal. Each animal acts or reacts differently.