I have read the SAAMI specs, and I still do not understand why they ever used or listed anything but PSI. With either crusher technology it should have been possible to calibrate the crusher to equivalent true PSI. I also suspect the higher instantaneous pressures recorded with electronics led to reducing the recommended charges in powder tables even though the previous weights had been proven empirically safe for years - in some cases decades.
I am a mechanical engineer. I was a licensed Professional Engineer for 36 years, but I recently let my license expire because I am going to retire and I am totally opposed to the what I consider stupid continuing education requirements. Physics has not changed. 99% of the licensees said it was not needed, but they don't take the State Board members out to lunch and who knows what else like the members of the sham education "industry" forking up ethics and other such trivia courses. That is the only significant change in the governing laws in decades.
I have run three machine shops. A good machinist is like gold in my book.
Last edited by Virginian; 10/26/14 09:03 PM.
