RE: Queston for you guys......
Wow, nice list of links there. I disagree though on one point with the above poster.
YES their eyesight is piss-poor plain and simple. Their noses however, are just as good as any hound.
I have been trapping hogs (sometimes hundreds a month) for about 25 years. I have stood next toa trap within 20 feet of the buggers and they had no idea I was there.
With the wind in their favor though.....yeah they would know! They can't see for crap, but they CAN smell you a loooooong ways away.
As to the original poster's question? Just from my experience bud?? Use any of the .30 cals and if you are just meat hunting instead of wanting a mount, shoot em in the head or squareon the shoulder.
I mentioned this before and will say again, I have seen hogs with their heart blown to smithereens run a long way.
On the flip side, a busted shoulder or a nice ear shot does not let them go very far.
Good luck to you on your hunt.