I concur with much of the advice you've received. Double Naught Spy is dead on and I think he's even being generous with the actual shooting ranges.
Not so much. Pig_Popper dropped this coyote at 220 yards, distance via GPS, 68% humidity, 84 degrees. Start video @ 2:10...
So I am thinking that shooting a hog that weighs 4 times as much (~100 lbs) would certainly be doable at a greater distance and a nice 200 lb boar should certainly be doable much farther as they will be so much larger in size.
Special ED 309 does a lot of longer range shooting with his old Pulsar Apex XD50 (25 micron instead of 17) and certainly managed to shoot a raccoon at 275 yards.
Not saying it's not possible with but you need some experience under your belt to ID, estimate proper range and then take a 200+ yard shot at night with thermal.
Identification can be tough, no doubt. Range estimate can be done numerous ways. While it is difficult to estimate hog size and distances through the flat perspective of thermal, knowing your terrain and landmarks can certainly be beneficial. In some cases, we will show up early and range landmarks in the field, determine field dimensions, etc. We know what the approximate distances are to animals near any landmarks. We generally like to keep shots under 200 yards.
However, if you know your stuff (note Special Ed's extra holdover and having assessed range before the hunt), you can certain make the Apex XQ50 work at greater distances, assuming you have a properly identified target.