Lew, I checked my files and noted that “Hoffman Products” was an alternate name used by this company but the original one was “Hoffmann New Ideas, Inc.”, although most sources list its name as “Hoffman New Ideas, Inc.”. It was established by Anton R. Hoffmann in August 19, 1979.
Here you can see some details of the projectile and loading press construction (from patent filled December 12, 1977). Fig. 5 shows the projectile loaded in a special short case described as a “special primer holder”. Number 40 shows the powder receiving hole which according to the manufacturer creates a “rocket-like effect”. I don’t think this was designed for automatic pistols of any caliber.