In my experience with several Ruger 77's in 7x57, whether or not they shot well depended on the individual barrel, and whether or not the chambers had the really long throats Ruger somehow felt compelled to put in 7x57's for a while.
The load I found shot best in one of those long-throated 7x57's was the 130 Speer Hot-Cor and, as I recall, IMR4064. But even the least accurate of those rifles shot minute-of-deer with more than one load. Or at least it did for typical deer hunting, but I haven't yet encountered a long-range hunter who picked a Ruger 77 7x57 to shoot deer beyond 600 yards. Though do know one who uses a Ruger 77 7mm Remington Magnum to kill elk beyond 600.
