Don't know of ANY pressure lab that tests peizo and publishes in CUP. Why would they?

I know of at least two companies that still sometimes test less-popular cartridges with copper-crusher equipment, because there isn't enough demand for the round to justify the cost of a piezo barrel.

Am always astounded at how many handloaders believe computer-simulated data is somehow more accurate than pressure-tested data.


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John Steinbeck