I see a lot of guys say no to truing. They are correct. You can shoot very small groups without truing. However if you plan on shooting at variable ranges accurately having the face perpendicular to the axis of the action thus the scope base centerline and the threads touched to insure the same centerline as the action. There is more to it than that, but at the very least a very fine hone removing the high spots on the action face goes a long way.