I should know better than to get into such a technical point with you (grin) but I'm guessing it is not the "what" that is at issue (simple enough to just not run the reamer in quite far enough) but the "why". I imagine it is a bit of added "fluff" to make their product seem superior, by letting their customer set it up as tight as possible. Just because a (bottle-necked) case is supposed to headspace on the rim doesn't mean it cannot actually be stopped at the neck first. Am just talking simple physical fit here, not the dynamics of whether such would be "good" or "bad", but I certainly agree with you that it is an odd tactic. Another thought - do they sell any '06 or .308 barrels? Perhaps they cloned the text and did not notice the non-sequitor?