The Sierra HPBT's in 257, 277, and 308 cals are great game bullets. Sierra will tell you that they are the "toughest" bullets that they make (stouter than their SPBT GameKings or Pro Hunters) and are generally about as accurate as their MatchKings.
Just 'cause a bullet has a hollow point, doesn't mean it was meant for varmints. The 257 120gr Hornady HP is tougher than their 117gr SPBT. Guess you could say that the X and TSX bullets have a HP, too.
