.30-06 JDJ

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

.30-06 JDJ
TypeRifle
Place of originUnited States
Production history
DesignerJ.D. Jones
Specifications
Parent case.30-06 Springfield
Case typeRimless, 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 length2.457 in (62.4 mm)
Overall length3.311 in (84.1 mm)
Primer typeSmall rifle
Maximum pressure60,000 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]

Overview

The .30-06 JDJ is a modified .30-06 Springfield cartridge designed to be used in the Thompson Center Arms Contender single-shot pistol. The idea behind it is to replicate the ballistics of a .30-06 fired from a rifle in a Contender pistol.[1]

Currently, the .30-06 JDJ is not offered by any manufacturers. Cases and bullets for it can be purchased from various companies for handloaders.

Description

Compared to a default .30-06 round, the .30-06 JDJ contains has a smaller neck that is at a 60-degree angle. However, the biggest difference is that the .30-06 JDJ has little body taper compared to the original .30-06 cartridge. This allows the .30-06 JDJ to hold an extra 5 grains of water (4.875 cm3) compared to the .30-06 Springfield, allowing one to put more gunpowder into the cartridge.[1]

This round manages to replicate in a pistol the ballistics of a .30-06 round fired from a rifle. For example, a .30-06 JDJ cartridge with a 200-grain bullet fired from a custom Contender has a muzzle velocity of 2,504 ft/s (763 m/s), while a regular .30-06 cartridge with a 200-grain bullet with 55 grains of gunpowder has a velocity of 2,558 ft/s (780 m/s).[2]

See also

References
  1. Barnes, Frank (2012). Cartridges of the World (13th ed.). Iola, WI: Gun Digest. pp. 270–271. ISBN 978-1-4402-3059-2.
  2. "Nosler". Archived from the original on 2012-10-06. Retrieved 2012-09-25.


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