.2925 Fired Case Neck Measurement

[Bill Alexander]

I am still worried about how tight that neck is. If brass is dropping out at 0.2925" and I assume it is being measured with a good micrometer then that will be the neck size. Brass for the Grendel seems to near exactly mimic the chamber neck size when fired brass is measured. Strangely the shoulder moves further than the chamber by a fraction and the body diameters are size on size or a few tenths below