Well, my name says something about how I feel on calibers and cartridges. Love the 6.5's, the x55 is tough to beat in my book, and would be the last to part, but I like being different, would have considered the 6.5BR, but now we have the Grendel w/in 1.5gr capacity, albeit PPC head size.
If I wanted a short carbine in 6.5, and I were building, I would really look at the 6.5x47 Lapua. Let's say a shorter version of a 260, but very efficient, and up to 130 gr, gives nice speed. Quality brass gives it a nod over a 260 in a custom for through deer.
I like the Swede day in day out for ALL types of hunting for proper twist-8" in nearly all factory mfg. rifles, wide range bullet weights not hampered in longer action.
That said, a 130 accubond or 125 partition in 260 or 6.5x47L would make an elk or moose, bear whatever VERY sick if hit square.