While they are recognized around the world for record-setting accuracy, MatchKing

and Tipped MatchKing

bullets are not recommended for most hunting applications. Although MatchKing

and Tipped MatchKing

bullets are commonly used for varmint hunting, their design will not provide the same reliable explosive expansion at equivalent velocities in varmints compared to their lightly jacketed Hornet, Blitz or Varminter counterparts.
if you read between the lines they say the tmk doesn’t expand on Varmits. That’s a 3” wide animal, probably too thick a jacket. Doesn’t mean they won’t expand on a deer which is a 12-18” across. I don’t think anyone is saying to use a light for caliber varmit bullet.
this is also why it’s going to be a long process to change minds and regulations. Colorado for one, doesn’t allow 223 for elk. If the law is changed it needs to be specific enough to say what to use as not every 223 bullet will do the job.