I just don't think that at 200 yds on the game he mentioned, there will be much noticeable difference.
I'm not so sure.
I had a shot once at about 200 yards with the .243 100 grain bullet (on a small deer of about 120 pounds). It was a quartering shot that hit the left flank and ranged up into the right lung. It stopped in the lung and had expended most of its energy before getting to the lung.
It really didn't wreck the lung and cause traumatic shock as one would wish. Heart and left lung showed no damage. That little deer traveled over 100 yards and probably would have gone farther if somebody had been in hot pursuit.
As it was, he decided to lie down and rest......and, of course, he died there.
But.....this was not satisfactory performance as far as I was concerned. He fled into heavy swamp and I was lucky to find him--ZERO blood trail--just blind luck.
I had a few other disappointing experiences with the .243.......where the bullet hit bones and didn't stay together as well as it should have or just plain didn't seem to destroy as much tissue as one would like to see for a quick kill.
And.......I suspect that some big pigs with thick hide and heavy bones could be even MORE challenging to the limited penetration capability of the little .243.
So......I have reason for my skepticism. I'd want a little more power if I might have to take a pig of substantial size and, as I said before, if I can't have a .30 cal. in a 180 grain bullet......I, at least, want the 120 grain of the 25-06 in the hunting the OP mentions.