Surprised that nobody mentioned Winchester 748. I use a 168 Sierra BTHP on top of 45.9 grains seated to an OAL of 2.800" with Federal match brass and a Federal primer. Choronographs identical to the Federal Gold Medal match load.
I know that others have had issues with Federal brass, but i have a never ending supply of match brass from the sniper team at the PD where I work and the brass has always treated me well. In my Remington 700, they shoot better than 1/2 MOA.
Most of the powders listed above by the others are harder to get in my neck of the woods in Kansas City, MO. Hodgdon and Winchester are easy.
"Whether we bring our enemies to justice, or bring justice to our enemies, justice will be done."
George W. Bush 9/20/2001
Charter Member of the V.R.W.C.