Shot placement is one of the reasons I prefer the .338's vs a 7 mag or similar for long range elk work, while it isn't a massive difference, a 300 Berger or 270 Bulldozer or other high bc .338 being launched from a .338 rum or bigger has less wind drift, which gives you more room for error in wind calls, probably the biggest reason people wound or miss at long range, which leads to better shots. With top end loads in both, it is usually half MOA or less difference even at 1000 yards, but it is still a difference. Plus your making a better hit, with more energy and a larger frontal area.
I used to use a .260AI for everything, and built my .338 for long range elk, and even though it only weighs 9.5 lbs, I am realizing I shoot it just as well as my 13.5 lb .260 AI, consistently half MOA or better on out.