I have a new 686 3" coming my way shortly. Two of my three S&W's were sightly clocked. My 640 was the worst, I sent that back to the mothership, and it came back within micrometers (if that) of being perfect. My NM66 is off by not quite half a groove. I'm not completely OK with it, but it's dead-on at the range, so I'm leaving it alone. My other NM66, which has a more current 2015 build date than my 2014 66, is perfectly aligned.

Really, really hoping for a straight barrel when the 686 is delivered to my FFL. <crossing fingers>