I suspect in the future, that .338 LAPUA will prove to be a useful caliber ammo.
Only if you're already good enough to drive nails at 1000 yards and want to shoot out to 2000 yards. Until then I'd suggest .308/7.62 - its cheaper, easier to find and still good from 300 out to 1000 yards.
So will .22 LR.
Funny, I caught myself shopping for a 338 Lapua last night.