375jdj Accuracy Loads

The following information has been provided by the creator of this cartridge, J.D. Jones:

The .375 JDJ is "made by simply running a .444 case through the .375 JDJ full length sizing die, the .375 is exceptionally easy to make. It headspaces on the shoulder but will headspace off the rim, too. Full charge loads are loaded the first time around. No fireforming is necessary. Firing a full charge load in unfired brass is comparable to firing factory ammunition in anything.

"In loading this cartridge — and a lot of others for that matter — disregard the cannalure. Seat the 220s, 260s, 270s, and 285s with the base of the bullet seated to the end of the neck. Heavier bullets should be seated at least 0.025" away from the lands.

"I've used this one on all huntable continents except South America which I intend to rectify in April of '94 on animals of practically all sizes and I have no intention of switching. When I'm serious about killing something big this is the one I take."

Editor's Note: The .375 JDJ has the distinction of being the cartridge that blew the outer framework off the gun port in our ballistic lab.

.375 JDJ

Gun

DOUGLAS

Max Length

2.248"

Barrel Length

14"

Trim Length

2.210"

Primer

FC 210

OAL Max

3.133"

Case

REM

OAL Min

--

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length Comment

SRA 200 FN

2015

43.2

1927

2015

48.0

2190

40,200

2.750"

2230

44.6

1898

2230

49.5

2157

40,200

2460

45.0

1912

2460

50.0

2173

40,600

2495

50.4

1901

2495

56.0

2160

36,500

Compressed

2520

48.6

2009

2520

54.0

2283

41,800

HDY 220 SP

2015

42.3

1881

2015

47.0

2138

41,900

2.755"

2230

43.2

1868

2230

48.0

2123

43,800

2460

43.2

1840

2460

48.0

2091

41,200

2495

46.8

1861

2495

52.0

2115

40,800

Compressed

2520

48.6

1984

2520

54.0

2255

42,600

Compressed

The following information has been provided by the creator of this cartridge, J.D. Jones:

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length Comment

SPR 235 SP

2015

40.5

1763

2015

45.0

2003

38,200

2.960"

2230

43.2

1803

2230

48.0

2049

39,900

2460

43.2

1775

2460

48.0

2017

38,100

2495

45.9

1766

2495

51.0

2007

37,600

Case Full

2520

45.9

1902

2520

51.0

2161

42,600

BAR 250-X

2015

38.7

1734

2015

43.0

1971

40,800

3.050"

2230

38.7

1709

2230

43.0

1942

42,600

2460

39.6

1701

2460

44.0

1933

40,600

2495

39.6

1740

2495

44.0

1977

44,000

2520

43.2

1806

2520

48.0

2052

42,800

HDY 270 SP

2015

38.7

1702

2015

43.0

1934

41,700

3.115"

2230

40.5

1722

2230

45.0

1957

43,500

2460

41.4

1740

2460

46.0

1977

44,200

2495

42.3

1699

2495

47.0

1931

42,400

2520

46.8

1844

2520

52.0

2096

45,100

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