I know my 6.0 needs a cleaning on account it chopped a few balls and I read somewhere that This can result in the bolt getting jammed because of the shells. Whether thats true or not it still needs a cleaning. Can someone give me a what to do and what not to do or send me to a place where it will tell me. It would be greatlly apreciated. I just dont want to **** anything up. If you didnt notice I havent take aapart a marker yet.