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

45 ACP M1911
45 ACP M1911

Myths & Misunderstandings About the “Modern Fighting 1911”

The Colt Model 1911 pistol and its derivatives are among the most iconic military handguns ever made. But in 2026, does the M1911 still hold up as a quality defensive arm?

Heir Apparent: The CZ 600+ Carbine

CZ's 527 action was long a popular option scaled around compact cartridges like the .223 Remington and the 7.62x39 mm. Now, the new CZ 600+ Carbine brings that same concept to the company's new CZ 600 series.

I Carry: Smith & Wesson Model 386 Night Guard in an ANR Design Holster

In our latest "I Carry" setup, we're featuring the Smith & Wesson Model 386 Night Guard in an ANR Design holster, and we've got a Streamlight EDC flashlight to round out our kit.

The Armed Citizen® Oct. 23, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

NRA Announces Nominating Committee & Petition Nominees for the 2027 NRA Board of Directors Election

The National Rifle Association has announced the official list of all 33 candidates nominated for the 2027 mail ballot election of directors, whether by the Nominating Committee, by petition of the members or both.

Saltstone Integrator Rifle Carry System & Modular Hunting Vest: The Cure for The Common Sling

Among a hunter’s most basic equipment is their sling. The Saltstone Integrator Rifle Carry System and Modular Hunting Vest seeks to revolutionize this.

Interests



Get the best of American Rifleman delivered to your inbox.