Jeffbird uses the smk a lot in 308 although I believe it's the 175gr version.
Correct, I use the 175 SMK with a 308. Used them on a whole bunch of deer and pigs over recent years and found them to be quite effective, although I am using Barnes TTSX's more and more.
The preferred shot placement which is most effective is diagonal between the shoulder blades. This placement works well with most all bullets. Broadside lung shots should be avoided if possible, and I'd say that with most other bullets as well. The bullet may punch holes through both sides, but they usually will run and the blood often will drain into the chest cavity rather than leaving a trail.
Example of an exit wound with high shoulder placement. Do not aim for a broadside lung shot. They mostly will not run with the placement shown.