Super Vel as a company began around 1963-64, in Shelbyville, IN. They started off making hot .38 Special ammunition, marketing mainly to law enforcement agencies. The business model was selling light expanding jacketed bullets driven at high velocity. They later began manufacturing other calibers. Super Vel ammunition did not become popular among ordinary shooters until around the late 1960s-early 1970s, and the company was responsible for forcing the major U. S. ammo manufacturers to begin offering similar handgun ammunition, instead of just lead and FMJ bullets at lower velocity, as they always had done. I don't know the actual history details, but the Super Vel brand name passed to another company in the late 1970s, and production was moved to another location. Anything with Shelbyville on the box is of original Super Vel production.