Loc: Howard County
My brother and I personally witnessed a local county commissioner pull up to a side gate of a well known outfitter's Hi-fence and he and the guide released 8 fresh caught hog's into the area, I suspect this goes on quite a bit on many places. Unless there's an inventory/head count not sure how you can prove illegal purchase unless you watch the gates and catch them in the process. The entrance to this gate was about 200 yards off the road with just a faint hint of a road going to it.
Yes a Weatherby does kill them deader.
Im sure there are all kinds of ways operations work... some may not want anything but big boar in the pens since its less to feed and you get about 3xs as much for a 300lb hog being killed than a 80lb... and if they were also raising other animals as well.
Some may want both in there if they are doing a lot of high quantity hog hunts... its hard to keep them fed though and the chances of raising big boar drop big time.