Wow, that sounds like one Hell of a great Ultra long range hunting gun.
Never understood why Rem made the 338 RUM brass .1" shorter than the 300 & 375.
What is the kick like?
There is an interesting review of this gun at:
Defensive Edge 338 Ultra+
The author shoots 250 grain Sierra MatchKing s. I'm hoping to get good groups in my new 338 RUM with 180gr Nosler Ballistic Tips. Do you know how well your gun shoots 180gr?