Just got my 308 back from having it threaded for a suppressor. Looking into the muzzle with a light I have spotted a fine scratch across the 12 o,clock land about 0.1in in from the muzzle. Even if it turns out to have no immediate effect on accuracy, will this now cause the top land to copper quickly? - this is quadruply frustrating since I won't be able to test the rifle for a couple of months due to an upcoming 'business' trip! How worried should I be?