338 not as flat as a 300... I've got a guide buddy that laughs when thats said, after he saw me hit a bou twice with a 338 a fairly LONG ways off.
All depends on bullet weight, but in general the slimmer .30-caliber bullets shoot flatter. That said, a 180-grain NOS bullet shot out of the .300WM at the standard factory velocities, hits the 500-yard mark just under 2" above a 180-grain NOS bullet (same bullet design and weight) launched out of a .338WM that has been sighted to the same POI as the .300. The reason for that is because the .338-caliber ammo is loaded around 200-300 fps faster.
Federal offered such .338WM load for pronghorn hunting, but lightweight bullets aren't very popular with .338 hunters. The 225-grain TTSX is my favorite for Alaska hunting.
The .375 H&H is more popular in the coastal areas, by Anchorage and Kodiak for example, but not so much toward the interior with moose and caribou hunters. In fact, the .30-06, .300WM, and .338WM outnumber all other hunting cartridges in Alaska.
