The gentleman that I talked to who has 2 reamers (different throats) and is getting "support" from Nosler for his custom rifle business says 800 rounds max. If all you want to do is hunt with it after sighting in and the occasional range day at distance, it will last as long as anything. For me I like shooting, so I'll stick to a creed, 260, 6.5x47 etc at the slower speeds in exchange for barrel life. Besides with all that powder there has to be recoil and noise to go with it. I'm far from sold as of yet.