I have less then 200 rounds through my doublestar star 15 upper.. There is what looks like two chips straight through the parkerizing exposing bare metal inside the bore in which the bolt operates. I only use alluminum cleaning rods so I dont think they were caused by me. Is this a concern? They may have occurred when I failed to properly eject/chamber a round during which two rounds got wedged into eachother. Again- is this a concern?