I recenlty had my ABS barreled 338 RUM delivered. I got the blank from a private party and had my gunsmith install it on a worked over 700 action. It shoots really well and I was wondering if any of you have first hand experience with one of these. I called ABS (now Proof Research) and they told me that these things are better than a standard stainless barrel and removing heat and that barrel longevity should be increased. I am just wondering how hard I can lean on this gun and make the barrel last. I'm into the barrel about $800 so I don't want to abuse it. Thanks for any advice.