RE: most accurate single shot?
In a hunting style rifle,the N.E.F. Handi Rifle,is very good. As to a bolt action,factory rifle,the Savage BVSS-S,is good.
As to Bench Rest guns,these are custom actions and there are a number of makers.[single shot ]
I shoot Bench Rest / Factory class,and use the Savage .<img src=icon_smile_blush.gif border=0 align=middle>
Mounting Man/in PA.