Re: Barrel Life .300 ultra mag
RWG, The barrel life of the edge is many rounds beyond the 300 ultramag from what I have found. I have both built back in late 1998 and shot 1000+ rounds. More erosion in the 300 ultramag by far. Of the 338-300 ultramags or edge I did 10-12 years ago that I am still aware of some have 1500 plus rounds on them and still shoot very well.
Sorry I don't have exact round counts but basically it is very hard to wear out an edge or 338-300 ultramag, whichever you care to call it, as long as you take care of it. As long as it is for hunting purposes. You can wear out any rifle shooting matches every week.