Life was pretty good for .308 shooters before Varget came on the market around 20 yrs ago and started being hyped as a "wonder powder" in the .308. Varget is a good powder and I use it in the .308, .30-06 and .303 Brit, but it isn't the best or only choice.
I did a lot of accuracy testing with match bullets in a heavy barrel .308 and really couldn't find too much difference among the following; IMR4895(as the saying goes, "if your rifle doesn't shoot well with IMR4895, then you've got a rifle problem"), IMR3031, IMR4064, H4895, BLC2, Varget and W748. The most accurate propellant for me in a couple of .308s has been WC755, a now discontinued Olin commercial grade ball powder. Both IMR4895 and IMR3031 were used in US 7.62mm match ammo and are always a good place to start.