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Again, I do not care what your position is on chamber specs as it came from bad information. SAAMI did not draw the specs for the military. I think Frankford arsenal knew what it was talking about. Putting up a smoke screen of information that does not pertain to the topic has no affect on a guy that has made chamber reamers from prints, from castings, fired brass, and the occasional wildcat. Some body explain to me how you can have thicker brass but not affect the neck diameter in the chamber? Military 30.06 and .308 brass has been known to be tight in civilian guns at the neck area. A lot of reloaders used to shave or ream the necks to thin it out. It is possible to use thicker brass and just have less case volume and basicly the same O.D. It is not possible to do that at the neck. It does not take much before you have a bad seal, especially with heavier brass, so the military chamber neck size is not overly large for the case that was intended for it.
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