If you feel like shooting ammo Lapua at about $120-$140 per box of 20 rounds, then yeah. .338 is my second favorite caliber next to .416B The standard brass though is fine.
Like Cossey said, only a good gun if you VERY proficient, have a true use for it, or are doing some large bore 1000yrd+ competitions.
Have you conidered a 7mm mag