That is one of my concerns too. Pressure at forcing cones and tight chokes, especially, because of the much greater hardness of HeviShot, would seem to require a rather thick coating of softer material to provide enough cushining to avoid damage to these areas of the barrel. I cannot help but think that this must be a much thicker coating than required to simply negate scorring of the bore. As noted in my original post, their silence on this issue raises suspecions.

Niklas