Question is: do you reload?
When I was reloading a 338 LM I believe i was about $1 a pop, maybe closer to two.
Can you afford a steady practice with it and do you actually shoot far enough to need it?
I do my best to shoot my rifles at least once a week, sometimes twice.
With the 338 LM it adds up real quick, and with a max range at the GGC of 550 yds it does not make any sense, a 308 is plenty.
But hey, if you are set on 338LM I just so happen to have a Nightforce for sale, which will take you out there without falling apart after 5 shots..