950 JDJ
("Parent Cartridge")
20mm Cannon
950 JDJ
This huge monolith of a cartridge was developed in 1996 by J.D. Jones
with SKS Industries making a few rifles which weighed over 100 pounds.
The cartridge is based on the military 20mm Cannon Vulcan case
shortened and bottle-necked to .95" diameter and is no longer in
production by JDJ. It is basically a Proprietary Wildcat Rifle cartridge.
The cartridges for sale are custom made from 20 Vulcan cases and
the finished cartridge is almost 5" in overall length, no powder, and
an old fired spent electric primer.
The head-stamp reads "REPLICA .950 JDJ, and the projectiles are made
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.