Hi y'll
new here, some friends told me to come here & ask this question:
what causes 2, 180 degree apart "twist" marks on the head of a fired round ??
i am in the market of buying ARs, particularly interested in pre-bans, one i test fired a few days ago showed those marks, at the very end of the deepest part of the mark there is a tiny cloth snagging burr....
i have removed the bolt, it is clean & burr free, in fact it was very smooth, extractor was clean, sharp squared edges & no burrs, ejector also smooth & tight fiting, the case nor primer shows signs of high pressure.., is this a head space problem ?? or is it just a real big "nothyng to worry about" thyngie......??
thanx, i lyke the forums, they seem so much more interesting now that i am after a 20 year lay off begining to exercise my 2nd amdt. rights......
see ya in the ammo section next