Okay at 10,000 ft using the ballistics calculator. I put my two speer bullet hand loads up against the standard .338 win mag using 180 accubonds. Here's the results.

338 win mag 180 gr accubond. .372 BC
Muzzle- 3120fps 3890ft lbs
500 yds 2221fps 1971ft lbs -34.6" of drop sighted in at 200 yards

300 win mag 165 gr spbt .520 BC
Muzzle- 3180fps 3705ft lbs
500 yds 2508fps 2305ft lbs -28.3" of drop sighted in at 200 yards

270 win 130 gr spbt .480 BC
Muzzle- 3200fps 2956ft lbs
500 yds 2474fps 1766ft lbs -30.2" of drop sighted in at 200 yards.

Knowing that you can push it over 3200 fps in a 338 don't mean it's accurate at 500 yards. These two loads I listed are dead nuts accurate. Some guns handle speed well some don't. I've never been a fan of a .338 caliber until the 338 RUM came out. That's what I call finally getting a boat up to speed. 180 gr bullets are not that great of a long range bullet in a 338 win mag. They will suffer the wind. Time in flight is one thing but so is BC.