No, that ones an electroless nickeled chromoly Rem 700, much modified in the magazine area of course. And I'm staying out of the "can't put Lapua's and Rigby's in 700's" debate.
We've been doing it for years, long before Remington started doing it themselves. The 700 is slightly ahead of the much vaunted MkV Weatherby in locking lug surface area and shear strength, and they've run the slightly larger diameter 378 Weatherby family for years. The 700 makes the lightest possible rifle in our 416R/338LM based chamberings with out going to a very expensive custom lightweight action.