Matchkings = Nono!
Brian 923--Sierra says, in all their ads, DO NOT use Matchkings for hunting, as they aren't designed to expand. They go on to state that their Gamekings are almost as accurate, and are made to properly expand and do a humane kill.
I've used Gamekings for target practice and for hunting; my experience is that in punching paper, yes, they are almost target bullets, and for shooting animals, yes, they are great at humane kills.
I've switched to Nosler Ballistic Tips, which are a hunting bullet; Nosler advertises them as "the hunting bullet that thinks it's a target bullet." I'm in a benchrest league right now, and using NBT's, and have a lock on second place for the league. I'm not going to catch the guy in first, but it's mostly due to my stock trigger, not the bullets.
The hunting advantage for me of the NBT's over the GK's is that the NBT's have a plastic tip which doesn't deform as easily with recoil in the rifle's magazine. Otherwise, for hunting, it's a wash between the 2.
But whatever bullet you use on game, it must be able to expand and do a humane kill. Matchkings, and most target bullets, don't do that.
I kinda doubt anybody's claim that they need the accuracy of a match bullet to hit game. The kill zone of a whitetail, for example, is far bigger than the 10-ring on a match target at any reasonable range for hunting. Add in breathlessness, adrenaline, lack of a really steady rest, and a live target which may move at any second, and benchrest accuracy goes right out the window.