Question: The Whisper family of firearm cartridges was developed by J.D. Jones of a company founded in what year?

Context paragraphs:
J.D. Power and Associates: J.D. Power and Associates is an American-based global marketing information services company founded in 1968 by James David Power III.  The company conducts surveys of customer satisfaction, product quality, and buyer behavior for industries ranging from cars to marketing and advertising firms.  The firm is best known for its customer satisfaction research on new-car quality and long-term dependability.  Its service offerings include industry-wide syndicated studies, proprietary research, consulting, training, and automotive forecasting.  It was ISO 9001 certified in 2002; however, this certification has expired.  McGraw Hill Financial purchased it from James David Power III in April 2005.  The firm is headquartered in Costa Mesa, California.  Private investment group XIO Group acquired J.D. Power in 2016.

Whisper (cartridge family): The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones of SSK Industries.  The Whisper Family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads.  The intention was to create an extremely accurate cartridge family for military, police, competition and specialized hunting markets that could also be easily sound suppressed.

.30-06 JDJ: The .30-06 JDJ is a firearm cartridge designed by J.D. Jones.

Roy Weatherby: Roy E. Weatherby was the founder and owner of Weatherby, Inc., an American rifle, shotgun and cartridge manufacturing company founded 1945.  Weatherby created an entire line of custom cartridges, and was one of the people responsible for the industry interest in high-speed cartridges.  He created a custom rifle action to accommodate his high-pressure cartridges.

Detonics: Detonics is an American firearm manufacturing company founded around 1976, which has existed under several owners and variants of this name.  Detonics is best known for its innovative design of compact 1911-style pistols, such as the Combat Master.

SSK Industries: SSK Industries, Inc. is an American designer and manufacture of guns and accessories.  Founded in 1977, the company is known for its custom Contender and Encore barrels.

Winchester Model 1895: The Winchester Model 1895 is a lever-action repeating firearm developed and manufactured by the Winchester Repeating Arms Company in the late 19th century, chambered for a number of full-size military and hunting cartridges such as 7.62×54mmR, .303 British, .30-03, .30 Army, .30-06, .35 Winchester, .38-72 Winchester, .40-72 Winchester and .405 Winchester.

.300 Whisper: The .300 Whisper is a CIP standard cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries.  It was developed as a multi-purpose cartridge, capable of utilizing relatively lightweight bullets at supersonic velocities as well as heavier bullets (200–250 grains) at subsonic velocities.

.41 rimfire: The .41 rimfire is a familyss in of firearm cartridges which were chambered in derringers and revolvers in the late 19th and early 20th centuries.  The .41 rimfire family was first introduced by the National Arms Company in 1863 as the .41 Short, chambered in their derringer.  In 1873 the slightly more powerful .41 Long was introduced in the Colt New Line pocket revolver.

Winchester Short Magnum: Winchester Short Magnum, or WSM, refers to a family of rebated rim bottlenecked centerfire short magnum cartridges developed in the early 2000s by the U.S. Repeating Arms Company, the maker of Winchester rifles and one of the oldest firearms manufacturers in the United States.  All of the WSM cartridges are based on the ".404 Jeffery" non-belted magnum cartridge which is shortened to fit a short rifle action (such as a .308 Winchester).

Supporting paragraphs: Whisper (cartridge family) SSK Industries
Answer: 1977