Marty,
The sights were originally filed in for the 8x58R load it was regulated for,and 222R will naturally shoot to a different poi.Due to the stiffness of the barrel bundle, it may not be very different, so recutting the rear sight may correct the problem.Also, changing to a different bullet may help.I have good luck with the 60gr Nosler Partition bullet.While heavier,it is not longer than the 55 gr, so it is likely to stabilize in a 1 in 14 barrel(assuming the liner is standard for 222,but it may be faster).If you try this bullet, you may be able to get closer by adjusting the load, w/o drastic sight changes.Re my previous comment, I think this will be a fun drilling to work with.
Mike