A less expensive alternative would be to have CH4D make you a set of bullet swage dies to reduce the diameter of .338 bullets to the size you need rather than having to special order an odd sized projectile.
Not cheaper by any means, but Hawk Bullets stocks them in 200 grain @ $43.50/fifty. I haven't tried that diameter, but other Hawks I've used are outstanding on game. Basically the old original Barnes, and that's a good thing.