push some dry cotton balls through the barrel using a .22 brush. Use a light to check for fibres, hopefully that will expose the rough spot.
You have to LIVE, DIE, and PAY TAXES, and pay for what you do between your LIVING and your DYING!
An American by birth, an Alaskan by CHOICE!
Iron sharpeneth iron; so a man sharpeneth the countenance of his friend. Prv. 27:17