Wow, there are SOOOOO many choices out there, lol. The .308Win is a very popular caliber, and it's hard to find a bullet that just flat out sucks. However, every barrel is different. In my Mossberg, I shot Remington CorLokt 150gr for years. Two years ago I switched to Federal Premium Sierra GameKings in 165gr. Quite a bit more kick than what I was familiar with, but they are great rounds.
Kind Regards,
Axel