The most powerful sporting rifle cartridge ever made. Fires a 3,600-grain (.951") bullet at 2,100 fps, generating approximately 35,200 ft-lbs of muzzle energy — roughly 15× the energy of .30-06 Springfield. The rifles weigh 50+ lbs and require a muzzle brake to function.
Type: Rifle
Introduced: 2005, United States
Parent case: None
Standardization: None
Bullet diameter: 0.95" (24.13 mm)
Case length: 2.76" (70.1 mm)
Max pressure: 25,000 PSI
Rim type: Rebated
Primer: 50 BMG primer
Typical twist rate: 1:24
Muzzle velocity: 2100–2100 fps
Muzzle energy: 35213–35213 ft-lbs
Effective range: 200 yd
Common bullet weights: 3600 gr
Primary use: Target, Anti-Materiel
Production status: Active
Also known as: 24.1x70mm (approximate)
History: Developed in 2005 by J.D. Jones of SSK Industries, the .950 JDJ is the world record holder for the most powerful commercially produced sporting rifle cartridge. Only a handful of rifles exist, all custom-built. The cartridge uses .50 BMG primers and custom-made brass. The cost per round is several hundred dollars. The rifles require NFA registration as Destructive Devices if the bore exceeds 0.5"…
Notable firearms: SSK Industries custom bolt-actions (50+ lbs)
Similar cartridges: .50 BMG, .577 Tyrannosaur, .585 Nyati