Hi everyone, I am new and this may be a dumb question so bare with me! I have taken on the love of guns recently. My dad and I got into it together and have both become passionate about it. Living in separate states im now on my own! Haha, so simple questions I don't have answers to as quickly. He usually cleans my guns. Anyways, I put 350 rounds through my PT-22 and went home to clean it. When I Put the brush through it, shards of metal came out of the barrel. It wasn't like the typical residue. Is this normal? I did put a lot more rounds through it than usual. I just hope I didn't mess anything up that will affect accuracy. All help is appreciated!