Weatherby Magnum

In 1958 Roy Weatherby introduced the .460 Weatherby Magnum and advertised it as the world's most powerful rifle cartridge. The .460 Weatherby Magnum is actually .458 caliber based on the .378 Weatherby case necked up.

Other than having an overwhelming urge to have the biggest and most powerful rifle cartridge possible, there is no need for the .460 Weatherby Magnum in North America.

The .460 Weatherby appears to be a well balanced cartridge ballistically. The loads developed in our test barrel were all extremely uniform. They were, in fact, the most consistent of any .458 caliber loads developed.

There is no SAAMI pressure limit for the .460 Weatherby Magnum. Weatherby factory ammunition produced 65,000 P.S.I. in our test barrel. These loads do not exceed that pressure.

For owners of a .460 Weatherby Magnum who wish a less potent practice load, I suggest using the data developed with Accurate 5744 or 8700. This will permit varying the velocities between that of a .45-70 and a .458 Winchester Magnum.

.460 WEATHERBY MAGNUM

Gun

DOUGLAS

Max Length

2.913"

Barrel Length

26"

Trim Length

2.898"

Primer

FC 215

OAL Max

3.750"

Case

WBY

OAL Min

3.335"

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length

Comment

455 (L) RNGC

5744

40.0

1520

5744

65.0

2192

48,800

3.605"

Penny's

HDY 350 RN

5744

61.2

2113

5744

68.0

2402

48,200

3.345"

2520

106.4

2779

2520

112.0

2956

62,300

Case Full

2700

115.9

2673

2700

122.0

2844

53,000

Compressed

4350

118.8

2657

4350

125.0

2827

49,100

Compressed

HDY 500 RN

2700

108.3

2383

2700

114.0

2535

64,700

3.710"

Case Full

4350

114.0

2454

4350

120.0

2611

62,400

Compressed

3100

120.7

2355

3100

127.0

2505

56,700

Compressed

HDY 500 RN

8700

128.3

1894

8700

135.0

2015

34,600

3.710"

*Compressed

* Reduced Velocity Load 341

* Reduced Velocity Load 341

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