Originally Posted by
ralph
It is indeed possible the barrel is toast..I did the same thing with my first AR,(bushmaster) lots of mag dumps..5000 rnds later accuracy is gone, keyholing, yup, just a few mag dumps too many. In my case, a new barrel and I was back in business..Now, to the OP..you said in your post the barrel in question was a chrome moly barrel. If it's not chrome lined, you may be able to save it..you'd have to pull the barrel and have it rechambered..very probably the throat is toast,Usually the rifling itself is in good shape, If the throat it self is gone, rechambering/rebarreling are your only options. I don't know how much this would cost, But if it was me,I'd use this opportunity to upgrade to a higher quality barrel if possible. I'd consider either a CHF barrel from DD, BCM, or a Noveske barrel, and maybe back off the mag dumps..