150's will do it. I've killed a lot of elk with 150's in a 270. We have guys on here who talk about shooting elk with their 243's and 25-06's. If those little bullets will do it, why won't a 150?
That said, I've killed a fair number with 165's out of a 30-06.
I'm definitely not saying that the 150 from a .308 won't do it, but particularly when it comes to C&C bullets, SD does matter. I certainly wouldn't assume that a .308" 150 gr Speer HC, for example, would hold together and penetrate the same as a .277" 150 gr Speer HC.
