SSK Firearms: A Pioneer In Cartridge & Arms Design

by
posted on August 20, 2022
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
SSK Industries

SSK Industries was founded by J.D. Jones—recognized as one of the industry’s foremost when it comes to creating innovative wildcat cartridges and cutting-edge firearm designs—in 1977. He brought a wealth of knowledge to the business, having learned to cast bullets and reload from a local gunsmith, later working with Lee Jurras in the early 1960s in the development of Super Vel Ammunition, the industry’s earliest entry into the high-performance handgun cartridges market. 

His business, at first, centered around handgun hunting. Jones was passionate about the pursuit since he was 13, and by 1969, he was already improving the performance and accuracy of the T/C Contenders he preferred to take afield. It didn’t take long before the company had an enviable reputation for creating highly accurate barrels for the rifle-cartridge-chambered handguns, and those created for his wildcat cartridges were the most popular.

A few of the cartridges he’s pioneered include the 6.5 mm JDJ, 6.5 JDJ #2, .309 JDJ and .375 JDJ, among others. None, however, were as much of a Goliath as his .950 JDJ that fired a 3,600-grain bullet. Muzzle velocity was 2,200 f.p.s., which translates to a shoulder-thumping 36,683 ft.-lbs. of energy as it left an 85-lb. rifle.

The endeavor was more of an experiment rather than an effort to produce dozens of the guns. Despite that fact, he still had to be granted a “sporting use” exception from ATF to build them. Only three were made, and the company stopped producing ammunition for the intrepid trio of owners in 2014.

Arguably, the company’s most important development began in the 1990s, when Jones launched research that led to his .300 Whisper. It runs in properly chambered AR-15s, uses standard 5.56 NATO magazines and, when using a suppressor with subsonic loads, lives up to its name.

“Since its inception, the .300 Whisper has been effectively used for hunting, target and silhouette shooting, animal damage control and law enforcement, as well as more clandestine operations most of us will never hear about,” Aaron Carter wrote for American Rifleman. “Knowing military and law enforcement professionals’ affinity for .30-cal. bullets and that ballistically superior projectiles better maintain velocity for increased downrange energy, flatter trajectory and less wind deflection, Jones designed the new cartridge around Sierra's then-available 250-grain MatchKing, the most advanced long-range bullet of the time.” A nearly identical version of the cartridge was later accepted by the Sporting Arms and Ammunition Manufacturers’ Institute for standardization under the .300 Blackout name.

Lehigh Defense acquired SSK industries in 2019 and, with the help and guidance of Jones, rebranded it SSK Firearms. The company’s accessories and barrels are manufactured in Wintersville, Ohio, while gunsmithing work takes place in Quakertown, Penn.—where corporate headquarters is also located.

In early 2022, Bill Wilson, of Wilson Combat fame, announced he had acquired the bullet and ammunition manufacturing arm—and name—of Lehigh Defense. SSK Firearms is once again fully focused on the guns that helped J.D. Jones build the company’s reputation for products that perform at the firing line and in the hunting fields.

Latest

Dead Air Rxd910ti Suppressor F
Dead Air Rxd910ti Suppressor F

"9 mm Optimized, But 10 mm Capable:" Dead Air's New RXD910Ti Suppressor

The new Dead Air RXD910Ti harnesses the technology of the patented Triskelion baffle system to make for a 9 mm-optimized silencer that is also capable for use with 10 mm pistol cartridges and more.

Revisiting A World War II Marine’s Story

Secretary of War Pete Hegseth, in his speech to 800 assembled generals, admirals and senior enlisted at Quantico, Va., on Sept. 30, 2025, quoted Eugene Sledge from his timeless classic With The Old Breed published in 1981.

Review: Leupold Rendezvous Soft Cases

Looking for something better than a cheap nylon bag, but don’t need it armored for air travel? Leupold has you covered.

Preview: Hiperfire Hipertrain

Hiperfire’s Hipertrain is a cast aluminum housing into which the AR-style trigger system, safety selectors and pistol grip of the user’s choice (none of which are included) can be installed to create a trigger demonstrator/dry-fire trainer

New For 2026: Kimber 2K11 Comp

Kimber increased its 2K11 product line with the addition of two models with single-port compensators.

AR-15 vs. Bullpup Rifles: Which One Is Right For You?

Though bullpup-style rifle designs have become popular elsewhere in the world, they aren't nearly as popular with the American shooting public as the ubiquitous AR-15.

Interests



Get the best of American Rifleman delivered to your inbox.