No its much closer to the 338 Sniper Tac them my 338 AM. In fact, from talking with Bob, its designer, the two may be interchangable. If they are not, the difference is very minute.
My 338 AM has the shoulder moved farther forward with a steeper shoulder angle for more case capacity.
The 338 Sniper Tac, 338 Big Baer and 338 Xtreme are all extremely similar, basically 338-408 CTs improved with a 35 degree shoulder angle.
Kirby Allen(50)