FOGeologist Posted September 21, 2022 Report Share Posted September 21, 2022 I fired 100 rounds at 200 yards a month back and had some really, really terrible results - first round flyers 9" to the right. I decided to anneal the brass after tumbling it and I noticed while annealing that... Every case had two nasty dents in the neck. There were long scratches that were much more apparent than before I annealed cases. I think Faxon may have sent me a "Monday after a holiday" barrel with an exceptionally poor chamber. I wish I had considered this more carefully before I inserted this barrel into my new upper yesterday. Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted September 22, 2022 Report Share Posted September 22, 2022 That’s not that bad bro… what’s your round count on the rifle? Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted September 22, 2022 Report Share Posted September 22, 2022 Looks pretty normal, just smooth it up with lots of ammo. Quote Link to comment Share on other sites More sharing options...
FOGeologist Posted September 22, 2022 Author Report Share Posted September 22, 2022 You guys may be on to something... I have perhaps 140 rounds on the barrel. I also pulled out primers that had been hammered into the bolt face - it's possible (probable) that there was a piece of brass or grit stuck in the chamber area that got scrubbed out when I took the barrel out of the upper receiver and hosed it down aggressively with spray cleaner and put a chamber brush in a drill and burnished the chamber for a bit. (No, I didn't do any damage to it) I have a cheapo borescope on the way to see inside the barrel so I can confirm my chamber and gas port look good. Quote Link to comment Share on other sites More sharing options...
dpete Posted September 22, 2022 Report Share Posted September 22, 2022 Those look like fang marks from the feed ramp edges. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted September 22, 2022 Report Share Posted September 22, 2022 ^^^ Yep, bet they line up with the extension ramp lugs. Quote Link to comment Share on other sites More sharing options...
FOGeologist Posted September 23, 2022 Author Report Share Posted September 23, 2022 You guys are both right. My new borescope reveals a barrel and chamber that are pretty great. gas port hole. A touch of erosion going forward. Quote Link to comment Share on other sites More sharing options...
dpete Posted September 23, 2022 Report Share Posted September 23, 2022 Another mystery solved! Dun Dun Dun <--mystery movie sound effect Quote Link to comment Share on other sites More sharing options...
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