Not real sure what you're asking, but I'll give it a try.
What is your intended use? Hunting? Targets?
If you plan on primarily hunting, I'll let others give their thoughts. For me, a 308 Win destined for hunting is at it's best with the 150-165 grain or so range of bullets.
If you want it for a target rifle, look at using the 175 grain Sierra MatchKings. Great accuracy, great characteristics.
You mention "some really heavy long bullets too". Give that some thought before you commit to chambering/throating for them, even assuming the twist will handle them. The 308 Win is best with the more mid-rangish bullets, not the top end of weight in .308 caliber stuff.
I shoot 168 SMKs out of mine, in 600 yard competition, and do fine. I've got a bunch of 175s here, just haven't got to shoot them yet in this particular rifle. Not sure I'd want to go above the 175s in a 308 Win.
Have fun with whatever you decide.