Dear 2x tap:
No offense taken. None at all. The only reason that I had mentioned the F.B.I.'s involvement with the cartridge, was that their initial acceptance is what inspired the 10mm's primary "splash" in the realm of "civilian pistoldom."
I believe that it was a big mistake for the Bureau to switch to the .40 "short and weak" in order to obtain an increase in capacity. I'm certain that we, as knowledgeable shooters, agree that volume of fire cannnot make up for poor marksmanship.
That said, I believe that the engineering of the .40 G&A was the genesis of the 10mm Automatic. Irving Stone was a co-engineer in this particular project. This was done, I believe, in 1972.