Accurizing a Grendel - Accuracy Advice

[biodsl]

Well, you won't find me knocking them. Twenty years ago they were building sub minute 5.56s

You probably don't want to hear this, but I'd recommend you save yourself time, money and frustration and ditch the barrel. Perhaps you could try to utilize the BA guarantee. Perhaps the next one would get you where you want to be. Or upgrade to a premium barrel. Which ever you do, don't waste anymore time on the barrel you have. Obviously you can shoot. That BA barrel can't.