165 grain in the 308. Hornady SP [not the sst's], Remington PSPCL's, Speer Hot Cores & if you need something with better penetration Nosler's Partition, Swift's A-Frame or Speer's Grand Slam although, as has been mentioned, for a 308 you're just gilding the lily by using premium bullets, as they were designed for higher initial velocities. Plus, given the lower initial velocity, expansion at longer ranges won't be what you hoped for.
I've always felt that there is no reason to use 150 grain bullets in the 308 since their ~100 fps initially higher velocity is offset by the greater energy at all ranges for the 165 grain bullets & the wind drift difference is negligible.