Originally Posted by
Marty Henry
Guess it depends on your cleaning regieme and what you call dirty. From new my workhorse 223 has only got a pull through with hoppes 9 on it if not used for a day or two and occasionally a boresnake or bronze brush. I have never specifically cleaned for carbon or copper and the round count is over 4000. The bore looks greyish even after "cleaning" and occasionally a copper streak shows so thats when the brush comes out.
I guess the barrels in equilibrium as it shoots a consistent poi.
I used to shoot target 22 and remember that if you cleaned the bore it could take 50 or more rounds before it settled down again.