The 309 JDJ was developed from the
444 Marlin by necking it down to .30" caliber, in a 308 sizing die and fire forming
to the shoulder length and size,making a
60 degree shoulder angle.
The 309 JDJ was developed in 1978 by
Mr. J.D. Jones
of SSK Industries for the Thompson/Center Contender single
shot pistol or rifle with a special 15"
SSK barrel.
These cartridges were produced by Quality Cartridge Company, so they
are considered
a proprietary cartridge not a wildcat cartridge, unless you make your own by
fire-forming or have very expensive
reloading equipment.
150 grain soft point
See JDJ vs 444 Marlin & 308 Winchester
in Picture at left. |
