That certainly puts a stop to the term "send the dogs in after em" unless they are mighty big and nasty dogs or better still well trained lions.
Them there pigs are near as big as our NT buffalo, would be interested to know if someone has info as to what breed they are, I seen some pretty big domestic boars and old breeding sows that have ate at their leisure, 1,000 + lbs would be easy in some which look like short leg hippos, but wild pigs here in Australia would be classed as being big at anything over 350 lb, most remaining now a long way away from the coastal fringe.
It's common here that a .243 with a poorly aimed head shot will skid off a wild boars skull, there wouldn’t be many that would use less than a .308 for the average size wild pig hunt here which kinda gives away just how big the common size are now days, even a .308 might be overkill as the normal pig hunt would be a matter of having a hide near the water hole pretty making easy targets to be fair.
Not sure how old or genuine the pic is but any Australian shooter that claimed a wild pig at 1,800 lb would be on every newspaper and TV station in the entire country and I've been shooting for 40 years, they simply don't get that big, possible buy doubtful, and near every part of the country, even the most remote areas has been visited by someone hunting wild pigs, horses, NT buffalo, and even wild camels of which we have more than the Arabs do.
Most real pig hunters use only dogs and a knife, rarely a rifle would even be taken out of the vehicle, but a large calibre handgun might be prudent in some areas to be taken along, just in case.