This is interesing concept - as mentioned, the overwhelming use for this caliber is benchrest. I'm not sure you would want to set up a Mini 30 with the kind of chamber normally put in a BR gun. OK, I know you wouldn't want to . . . . But I would suspect you could get "minute of groundhog" accuracy out of a loose chambered 6MM-PPC; even in the sloppy Ruger action.

Although I know there are some highly modified Mini 14's and Mini 30's out there that can shoot fairly well, the design of the weapon is not very condusive to precision shooting. It's about as tight and true as an AK-47. Personally, I wouldn't waste that kind of money on a Ruger urban assault rifle.