How many rounds do you think you had on the barrel when it gave up?I built a standard 284 on a Turkish mauser action and had to open the feed rails slightly to get it to feed. The nose of the bullet would hit low on the face of the barrel. Once I opened it up so the round would come up with the nose higher, I never had a problem. Since then, that barrel went south. On the next barrel, I went to a standard 280 Rem and it still feeds fine.