I run 168s out of my 308, don't recall the speed. In fact I run SMKs, and Barnes in 168s. Bergers in 185s.
All work the way I want. Punch the ribs, caliber in, a bit larger exit, but no exit hole thats big, IE looking for dime size maybe.
Won't shoot bones unless I have to, and have been fine so far.
I read all the push light barnes fast, and I don't doubt it works, but my buddy and my 257 wtby with 100 barnes running fast, kills like my 308 running slow. Punch em, they run a bit, and are dead.