.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 .197 in (5.0 mm)
Neck diameter .220 in (5.6 mm)
Shoulder diameter .353 in (9.0 mm)
Base diameter .375 in (9.5 mm)
Rim diameter .376 in (9.6 mm)
Rim thickness .041 in (1.0 mm)
Case length 1.925 in (48.9 mm)
Overall length 2.455 in (62.4 mm)
Primer type Small Rifle
Maximum pressure (around) 52,000 psi
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.

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. 1 2 3 Barnes, Frank (2012). Cartridges of the World (13th ed.). Iola, WI: Gun Digest. p. 270–271. ISBN 978-1-4402-3059-2.
  2. ↑ "Nosler". Retrieved 2012-09-25.
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