I have a harem of "perfect, all around Alaskan rifles " that I keep in camp as loaners for guides, packers and clients. They are chambered in .338, 9.3x62, 375 H&H and Ruger and .416 Ruger and Rigby.
The 375 Rugers are the most popular by far. The 375 H&H and the 9.3x62 come in a distant second.
Although both .338's are superbly accurate, very few of today's hunters seem interested in either them or the 416's

I also just returned from the annual SCI convention in Las Vegas and heard from a good number of African PH's that the .375 Ruger is making serious inroads in popularity over there as well.

Phil Shoemaker
Alaska Master Guide,
Alaska Hunter Ed Instructor
FAA Master pilot
www.grizzlyskinsofalaska.com

Anyone who claims the 30-06 is not effective has either not used one, or else is unwittingly commenting on their marksmanship.