I have been a long time lurker here, just officially signed up, I came across this thread and wanted to add to it. I have had great success with proof and hardy engineering carbon barrels. Sendero, full bull profiles. As far as a difference between them I think you would be hard pressed to find one at the end of the day. They all shoot very well, so well I have slowly switched out all of my bartleins and Douglas barrels to them. Not because Douglas or bartlein aren't accurate, because they are, I achieve the same or better accuracy with a third of the weight. For hunting purposes, I'll take that everyday.
22 creedmor, 338lm in Aiax, 6.5cm hardy barrel, LRI 22 cm and 308win.
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To each their own, every barrel has a specific use. Cant go wrong with a rifle that shoots bug holes, no matter what it's made from.