"Best" is usually subjective. My Family and I have killed lots of Deer with 150 grain bullets. The Wife and I use 150 Sierras and the boys when younger used 150 RP, Winchester, Speer, Hornady, ect. Mostly because they tended to loose them from hunt to hunt. With Hogs, its a mute point. We hunt them off of stands like Deer and I usually wait for a head shot from the side.
I just built another 308 with a 20" Varmint weight barrel and a 1-10 twist. My favorite load of 150 Sierras and 4064 shot well but not as well as I wanted so I have some 168 Berger VLD Hunters loaded but have not tried them yet.
The problem with a 308 is choosing the "best" load. They usually shoot so many things well.
