Topic is about shooting Kodiak bears and you want to extend the range. The 30-06 is somehow not enough.
Somebody says they want to shoot longer for other things. Kodiak has no wolves nor wolverines. And if they did they probably have no idea what a wolf hide looks like after meeting a 338WM.
The venerable 375H&H has been compared to shooting a 30-06 with 180gr bullets, trajectory-wise.
The 30-06 works much better in my direct experience with either 180 or 165/8 grain bullets...
So you suggest going much bigger for much smaller, nonexistent game at extended ranges...
You now have more than several clues but I am betting none will stick.
Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.