My daughter shoots a 22" 6.5SLR. Pushes a 130 OTM @ 2910fps and absolutely hammers game. From 60 to 637 so far. A few big mule deer bucks, pronghorn, coyotes, jackrabbits, to a 741 yard squirrel.
I like it so much, I will be building a 18-20" 6.5SS next year specifically for carrying with a suppressor. I will probably run the 150 SMK in mine unless the Matrix bullets become available again.