And a fast food joint will tell you that their food is good for you. Your argument is a red herring. Talk to gunmakers that have to deal with the damage. None of the British makers recommend this crap in their rifles. There was never a problem with barrel damage in double rifles until small operators looking for a cheap way into the bullet making business started producing monometals. Everybody denies responsibility, so somebody is lying. If I recall, somebody posted something from Barnes saying they had never received any complaints from DR shooters that had barrel damage from their bullets. That's a lie. I know of one from a man that I knew well. Another complaint was mine.

This has been a well-known problem for a long time. Your characterization of the issue above was a calculated insult to Mac, and highly unworthy of you. You need to research the issue a great deal more (including speaking to some credible sources, which Barnes is not) and get some hands on experience with the issue yourself - you're not a double rifle shooter - before debating someone much more experienced than yourself.