Ok, my first time cleaning the gun after zeroing and shooting 100 rnds. When I was in the Army, especially in basic, they taught us to be very meticulous about our cleaning but it was clp all the way. No special cleaners. I can't recall them teaching us which end to start first, from chamber to barrell or vice versa, I don't think they cared. I've seen the M16 get put through all kinds of torture. Bayonett training, purposely thrown down by the DS's to show how much they can take, dropped on concrete, etc. Anyhow, I forgot to lube my barrell before I put a brush in but it was too late. I was about a couple inches in the barrell cleaning from the chamber out, and the brush was getting stuck. So realizing what kind of crap we put them through, I'm not worried much but can someone give me a reason to worry. I had to moderately pound the cleaning rod through the barrell to push it through since it was in too far and tight to pull out. Oh, I can still hear the screeching of the barrell and brush now. Makes me cringe. BTW, it is a chrome moly lined barrell. So, did I F up my barrell, lol.