Is there something very wrong with my Faxon barrel?

[montana]

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-I don't exactly know what your mean by headspacing the barrel/bolt. I had a bolt from a bear creek upper that I was using, recently replaced it with an Ultrabolt, didn't notice a significant accuracy change.
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Every AR bolt and barrel should be checked for head space..Many don't understand the importance of a go, no go and field gauge..

IMO the go gauge is the most important because I have seen a lot of short chambered barrels in the AR platform..A short chamber can cause chamber pressure spikes, blown primers, reliability and accuracy issues..

People who think it is unnecessary to check new bolt/barrel combinations because of modern manufacturing are wrong..Replacing any new bolt and barrel combination on any AR should have the head space checked..Many get away with it or don't see the signs, so the rumor continues...I sort my bolts small, medium and large.. I have one new Grendel bolt that won't fit any of my barrels as it is too large..I keep it if I run into a longer chamber..

If a barrel has a tight chamber, the problems will magnify when the chamber gets hot..The chamber actually shrinks in on itself when it the chamber heats up, causing an even tighter chamber..

This is why a 5.56 chamber uses a different go gauge than a 223 commercial go gauge..The 5.56 minimum go gauge is .001 longer than a 223 commercial go gauge..