Formidolosus,
You're the guy in the know and I appreciate the sharing. I agree that my anecdote about M855 scoring well is a statistical artifact. ...it was interesting nonetheless that the experienced riflemen were able to center up and still put them down the middle where everyone else was complaining about poor accuracy.

Questions about A1; The early press releases were about M855A1 utilizing a composite tungsten slug behind the steel penetrator. Not true? There were also later bits about the hazards of tungsten potentially dooming 855A1. On the match accuracy front, there was a bit of hoopla about 7 or 8 years back where Rob Harbison, former AMU Olympic shooter was drafted out of his retirement by Picatinny to shoot at Camp Perry across the course with M855A1 and turned in some very respectable scores. More than respectable for someone shooting a mag length round all the way across to 600 yards. Hand picked lot? Pre production with high QC?