.30-06 JDJ

.30-06 JDJ
Type	Rifle
Place of origin	United States
Production history
Designer	J.D. Jones
Specifications
Parent case	.30-06 Springfield
Case type	Rimless, bottleneck
Bullet diameter	.309 in (7.8 mm)
Neck diameter	.335 in (8.5 mm)
Shoulder diameter	.455 in (11.6 mm)
Base diameter	.470 in (11.9 mm)
Rim diameter	.457 in (11.6 mm)
Rim thickness	.0433 in (1.10 mm)
Case length	2.457 in (62.4 mm)
Overall length	3.311 in (84.1 mm)
Primer type	Small rifle
Maximum pressure	60,000 psi (410 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 125 gr (8 g) 3,197 ft/s (974 m/s) 2,785 ft⋅lbf (3,776 J) 150 gr (10 g) 2,930 ft/s (890 m/s) 2,860 ft⋅lbf (3,880 J) 180 gr (12 g) Speer 2,666 ft/s (813 m/s) 2,840 ft⋅lbf (3,850 J) 200 gr (13 g) Speer 2,504 ft/s (763 m/s) 2,785 ft⋅lbf (3,776 J)
Test barrel length: standard SSK-manufactured barrel Source(s): Cartridges of the World[1]

The .30-06 JDJ is a firearm cartridge designed by J.D. Jones of SSK Industries.

Overview

The .30-06 JDJ is an improved form of the .30-06 Springfield cartridge designed for use in the Thompson Center Arms Encore platform. The body taper of the parent cartridge has been almost entirely eliminated in the JDJ design. The shoulder has also been blown forward considerably, with the angle sharpened to 60 degrees. These design features, reminiscent of the earlier .30 Gibbs, greatly increase the powder capacity of the cartridge over its parent. As a result, a 15” Encore pistol chambered in the .30-06 JDJ can safely equal the performance of a 24” rifle in the .30-06 Springfield.^[1]

Quality Cartridge offers headstamped brass for the .30-06 JDJ,[1] which can also be fireformed using standard .30-06 cases. SSK Industries currently offers Hornady Custom Dies for the chambering.[2]

Gallery

• 
  .30-06 JDJ cartridge next to its parent case, the .30-06 Springfield.

See also

• .30-06 Springfield

References

This page was last edited on 23 December 2023, at 04:43