The .260 Rem is plenty for moose. A big bull elk is harder to kill and my biggest bull ever was taken at 435 yards with a 125gr Nosler Partition fired from the similar 6.5x.284. Went down like he was struck by lightning and never even twitched. Bullet destroyed both shoulders and left a 2” exit hole. There was nothing left of his boiler room.

If you want to take it because you have confidence in it, load your .260 up with Barnes 120gr TTSX or 130gr TSX and rock on. Those bullets will penetrate as deep as anything.