If its just about doing some long range target shooting, using your Tikka as a single shot wouldn’t be the end of the world if it comes to that.
There’s plenty of good reasons to use 500 ish range as a cut-off, so I won’t argue that. On the other hand; if it is just about keeping 1800 fps of energy, then I feel like mentioning that my own 190 ABLR load will take that out to 775 more or less. Just sayin’

. Used that for some red deer herd reduction shooting, but not on anything as big as a moose.
The farther you push things down the high BC road the touchier they tend to get for getting them to shoot. Back off to something like a Ballistic Tip or Accubond and it sometimes seems lime you can’t do anything wrong. There isn’t a moose in the world that I wouldn’t shoot with a 180 Ballistic Tip or Accubond.