A counterbore is when the rifling and part of the inner diameter of the bore is drilled out from the muzzle back far enough to get rid of boogered up rifling.The need for counterboring is caused by poor cleaning methods, ie: not using a rod guide. counterbore is when the rifling and part of the inner diameter of the bore is drilled out from the muzzle back far enough to get rid of boogered up rifling. The need for counterboring is caused by poor cleaning methods, ie: not using a rod guide.
Eileen Fisher - Highland Park 640 Central Avenue, Highland Park IL 60035 Phone Number: (847) 433-5440
We welcome phone calls to schedule meetings and personal tours of Laurel View Village: Call local number: (814) 288-2724 or toll free (800) 400-1192. Lori Knox (phone extension 284) will be pleased to help you.Normal business hours are Monday thru Friday 9 AM to 5 PM.e welcome phone calls to schedule meetings and personal tours of Laurel View Village: Call local number: (814) 288-2724 or toll free (800) 400-1192. Lori Knox (phone extension 284) will be pleased to help you.