Brady Center on study of microstamping
It "utilized vintage firearms that had never been considered for testing previously because of their model age (10-50+ years) and mechanical condition" The guns used were S&W .40 calibers -- hardly a cap and ball!
"NanoMark Technologies, which holds the patent for microstamping technology, provided firing pins for the study, but they were not optimized due to Beddow's budget constraints." Hmm? No details on what this optimization would have been, or why it would have affected wear on the firing pin. That it was so expensive as to prevent the manufacturer from undertaking it does not bode well for the argument that the expense of microstamping would be reasonable.
The whole debate omits the simple point that a commenter made in the earlier post. A crime-fighting technology that a criminal can negate with a few swipes of a file is not a very good one.