friends:
The 1933 Dupont "Smokeless Shotgun Powders- Their Development, Composition and Ballistic Characteristics ", by Wallace E. Cox, cites "piezo-electric" gauge data. The data was collected, according to the handbook, as early as the mid 1920's.
Regards
GKT
Texas Declaration of Independence 1836 -The Indictment against the dictatorship, Para.16:"It has demanded us to deliver up our arms, which are essential to our defence, the rightful property of freemen, and formidable only to tyrannical governments."
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