The .338 JDJ is based on the .444 Marlin necked down to .338 caliber, delivering heavy bullet performance for a pistol cartridge. It bridges the gap between the .309 JDJ and .375 JDJ in the SSK lineup.
Type: Pistol
Introduced: 1979, USA
Parent case: .444 Marlin
Standardization: Proprietary
Bullet diameter: 0.338" (8.59 mm)
Case length: 1.56" (39.62 mm)
Overall length: 2.035" (51.69 mm)
Rim type: Rimmed
Primer: Large Pistol
Muzzle velocity: 1600–1900 fps
Muzzle energy: 1137–2005 ft-lbs
Effective range: 150 yd
Common bullet weights: 200, 225, 250 gr
Primary use: hunting, handgun_hunting
Production status: Active
Also known as: 338 JDJ
History: Part of the large-bore JDJ series built on the .444 Marlin case, the .338 JDJ was designed for hunters who wanted .338-caliber bullet performance from a TC Contender or Encore. It is particularly effective on large deer, elk, and hogs at handgun ranges.
Notable firearms: Thompson/Center Contender, TC Encore
Similar cartridges: .309 JDJ, .375 JDJ, .338 Federal