i can shoot those kind of groups with my 788 remmy in 6mm but i dont know about using a 6x scope. 60 yr old eyes ain't up to that anymore.i shoot a 6x24x40 4200 elite on mine.i'm hanging tight at 1 3/8" at 400yds and have shot under 2" at 500.

70grn varmagedons in a 1/12 twist barrel.i own a few tikka's that shoot really well but they are deer guns and i never shot them that far.