The 14.5mm JDJ is a rifle cartridge originally created by SSK Industries of Wintersville, Ohio. SSK Industries is now SSK Firearms and no longer appears to sell the cartridge.
It uses the .50 BMG case with the neck opened up to accept a bullet. It fires the bullet at with the fire-formed load. The Barnes bullet can also be loaded to . It has a destructive device exemption. Only rifles chambered for the .50 BMG can be converted to this caliber.