The .375 JDJ is the largest of the common SSK JDJ pistol cartridges based on the .444 Marlin case, necked out to .375 caliber. It is used by serious handgun hunters pursuing large and potentially dangerous North American game.
Type: Pistol
Introduced: 1979, USA
Parent case: .444 Marlin
Standardization: Proprietary
Bullet diameter: 0.375" (9.53 mm)
Case length: 1.56" (39.62 mm)
Overall length: 2.06" (52.32 mm)
Rim type: Rimmed
Primer: Large Pistol
Muzzle velocity: 1500–1800 fps
Muzzle energy: 1100–1943 ft-lbs
Effective range: 150 yd
Common bullet weights: 220, 250, 270 gr
Primary use: hunting, handgun_hunting
Production status: Active
Also known as: 375 JDJ
History: Developed by J.D. Jones as the heavy end of his Contender cartridge family, the .375 JDJ offers impressive energy levels for a single-shot pistol. It has been used successfully on elk, moose, and bear, and sees occasional use in Africa on plains game by handgun hunters.
Notable firearms: Thompson/Center Contender, TC Encore
Similar cartridges: .338 JDJ, .375 Winchester, .375 H&H Magnum