Out of the box stock with factory ammo,between the 2 you ask about it would be the Ruger.
The best out of the box stock with factory ammo Browning A-bolt which is sub 1" groups at 100 yards..
When someone tells you it's Browning and then the rest .. well they mean it.
Of four centerfire rifles suitable for hunting whitetails, Ruger’s M77R Mark II and Browning’s Medallion A-Bolt II nudge out models from Remington and Winchester.
http://www.gun-tests.com/performance/apr97FT270.html