At lot depends on the brass. Remington and Federal brass is typically heavier and thicker than Winchester, and 59 grains is about all that can be stuffed in the case, even with H4831 SC. But in Winchester cases I used to use 60 grains of the "long-cut" version, and even from the 22" barrel of the Ruger 77 I was shooting back then it got around 2675.
I've gone up to 61 H4831 with 180's with no problems. In fact that same rifle shot bugholes with 180 Speer Grand Slams and 61 grains, at right around 2800.
The primer can make a difference too. A magnum primer will result in a little extra zip--or the same velocity with a little less powder.
