The .300 is easier to fiddle with because the best bullets are easier to define, Deer sized game, simply anything or something in the 165-180 grain. Larger game, the better 180's or 200's.
The .338 can be simpler because most are bought for a hunt that will never come after Brown Bear or Moose, so most rifles will cover the same game as the .300's.
The difference here is that all .338 bullets are made for the .338 so you don't have that separation of suitability for the magnum case you get with the .300 where the bullets are largely made for the .30/06 and can sometimes fail to perform in the larger case for usual shots under 200 yards, which is most of them.
When truth is ignored, it does not change an untruth from remaining a lie.
