I still have my Kimber Montana in 325. I have not shot it in quite sometime. I have only killed paper with it. From what I recall, it grouped the factory loaded DoubleTap 200 grain TSX's pretty well. I have swapped the 1.5-6x42 scope for a 1.7-10x42 scope, but have not sighted it in. I need to work up a hand-load for the 200 TSX.
I think it is a fine cartridge. And a reasonably lightweight combination in the Kimber Montana.