And that would be the "Super-Vel" ammo that started all the high velocity, light bullet loads, correct?
I recall my dad doing some training and being impressed when the Colo State Patrol first issued those to him in place of the 158 gr round nose ammo. For a state trooper, those old rounds were worthless for dealing with fleeing suspects in automobiles. BTW, I now own the 4" Colt Python that was his issued duty gun at that time. Dad bought it when the CSP switched to Smith model 19s and gave it to me later.
I still have about half a box of Super Vel 9mm 90 grain jhp which I bought back around 1970. It really is hot ammo.