I have one, they said 3 months and that is what it took. The problem is if they do not have a blank in the barrel you, they have to wait on a blank. They worked well with me and did a great job. Barrel and action are at the smith right now. I do know some guys with them and they are very happy. As far as barrel burn they say that because they dissipate heat better they will last longer. Do not know for sure but that is the idea. Hope this helps.