Heard lots of tales about 400 pound wild boar. I have never seen one. And I have been hunting them for some 45 years or so.True there are big differences between true wild boar and feral hogs. Wild boar can grow to well over 150lbs. The boar in the photo, post #46 was 107kg =235lb and I've seen bigger on my place. A local farmer 85 years old shot one a couple of years ago that weighed over 150kg and I've seen when hunting in Portugal and Hungary some very large boar shot. I've shot quite a few in the 150lb range.
I have however seen some very large feral pigs. And the further east I travel the more common it is to see larger feral pigs. I have seen 300 plus pound feral hogs.
Here is an older article from NCWildlife about true Russian/Eurasian boar. It lists the weight of 180 pounds or less.
https://www.ncpedia.org/wild-boar-nc-wins