950 JDJ
("Parent Cartridge")
20mm Cannon
This huge monolith of a cartridge was
developed in 1996 by J.D. Jones with
SKS Industies making a few rifles which
weighed over 100 pounds.
The cartridge is based on the 20mm
case shortened and bottle-necked to .95"
diameter and is no longer in production
by JDJ.
This used to be a proprietary cartridge,
but now should be considered a wildcat
The cartridges for sale are custom made
from 20 Vulcan cases and the finished
cartridge is over 5" in overall length,
filled with inert power, and an old fired
spent electric primer.
The head-stamp reads .950 JDJ, and the
projectiles are made from solid brass
(left projectile) or solid aluminum
(right projectile); your choice
They can be shipped with live
ammunition, or mailed by themselves, as
they are inert.
950 JDJ
950 JDJ with Solid Aluminum
projectile: $ 49.95 per Cartridge
950 JDJ with Solid Brass
projectile: $ 59.95 per Cartridge