IIRC (& please don't quote me on this!), the 250 GameKing had been the go to .338 Long range bullet for a long time as it was the only high BC projectile that was game proven & readily available. The newer versions out there are starting to displace the GK as it is "old school" & not as shiny!
Non-bonded, no polymer tip.... but as a long range bullet, I think you will do quite well with it, I wouldn't want to punch a moose or griz @ 75yds as I don't remember it being designed to put up with RUM velocities. It could definitely deform in your mag, one of the MAJOR down sides to the exposed lead nose... might go single shooter with this one.
I'm no expert on the GK, just things I remember (or think I do) reading/hearing about it.