My 6.5x47 has almost 3500 rounds through it. For a while I've been using JB every once in a while to reduce the carbon build up in the throat but it seems to getting worse now probably because of the fire cracking. I no longer see land marks on a jammed bullet, just a solid ring. My pressure also starts to increase from this. I'm guessing my barrel is almost done but was wondering if anyone has any tricks to remove this.