Darren007's reply is fundamentally correct, but some collectors avoid counterbored C&R rifles because a counterbore generally means the gun has seen heavy use and the rest of it is in less than pristine condition.
OTOH I've seen plenty of shot-out milsurps that
weren't counterbored.
Furthermore, many collectors- particularly those like myself who have caught Surplusitis- have an appreciation for ugly guns.
