I have just started with a Remington XCR 270WSM. Factory barrel. As I was cleaning it for the first time I noticed a "burr" in the end of the barrel. My smith bore scoped it and confirmed there was something there a scratch in the grooves about 3-4 inches from the muzzle. As I push a cleaning rod through the bore, as I get towards the muzzle it feels as if the barrel loosens up then tightens back down. I can feel the rough surface of the "burr" with the patch. I took it to the range to shoot it this weekend but was only able to get 3 shots through it because I was cleaning between each shot. It seems like it takes forever to get this thing clean. I'm using RL 22 with 140g accubonds. Not alot of copper but a ton of powder residue. My questions are. 1) Should I send it back to Remington now and have them look at it? 2) Shoot it and see how it shoots? 3) JB Bore Paste it? 4) If I send it to Remington what are the chances that they actually do something about it? 5) Why does it feel as if it opens up toward the end of the barrel? All opinions are welcome. I know I'll hear scrap the barrel but that is the last resort. Thanks for the help.