If memory serves correctly, CIP in Europe does their piezo pressure test with cartridges that have a hole in the case that aligns with the hole in the chamber. So if I'm not confused, their pressure transmission rod is exposed to the gas without cartridge brass in the way.
Cartridge brass reduces the measured pressure by about 5-7000 PSI.
Thank you for stimulating my gray matter again, too much of what I absorb leaks out of my ears over time.
CUP vs. PSI — What’s The Difference in Pressure Measurements
by Philip Mahin, Sierra Bullets Ballistic Technician
http://bulletin.accurateshooter.com...the-difference-in-pressure-measurements/Note to all, Accurate Shooter is a great place for reloading info. Just remember to wear ear plugs and not loose it all.
