"With premium bullets like CDP, Partition or TUG, SWIFT A-Frame... you have an equal cartridge to the 375H&H with better accuracy"

I sure don't agree with this statement. I've owned 2 different makes and shot 3 different rifles chambered in .375H&H
and every one of them has been a sub MOA shooter.
The 1970's Sako was a clover-leafer, a 3/8" C to C shooter, virtually every time & that was with a Leuy 2-5X scope.