There always has to be one.
I can't possibly see a place where a 338 Federal offers much over
A 180 out of a 308.
Make it a Partition, and it would be fine any where on this continent.
But, I'm boringly practical.
This is where I'm at. I have a 760 in 308 (2 actually) and was debating a 338F vs 358W, then asked myself what I was really gaining. For the time being I've talked myself out of it, but as far as the OP, it's your money. Have fun if it's what you want.