Winchester Magnum

The .264 Winchester Magnum was introduced by Winchester in 1958. As originally introduced in Winchester's Model 70 "Westerner," it was available with a 26 inch stainless steel barrel. The .264 Winchester Magnum was designed to produce what Winchester hoped would be the ultimate open-country hunting cartridge for deer-sized big game. To accomplish this feat of engineering, Winchester's ballisticians utilized a 2-diameter bullet with only the section aft of the cannelure being full groove diameter.

Complaints by shooters who did not understand the necessity of the 26-inch barrel to produce the advertised ballistics caused Winchester to reduce the length of the rifle barrel to 24 inches. With its shortened barrel the .264 Winchester Magnum was unable to live up to its advertising claims and quickly fell from favor with the shooting public. This coincided with the introduction of Remington's 7mm Remington Magnum cartridge whose arrival sounded the death knell for the .264 Winchester Magnum.

As originally designed and produced the .264 Winchester Magnum was, and still is, an excellent cartridge for medium sized North American game.

The SAAMI Maximum Average Pressure for the .264 Winchester Magnum is 64,000 P.S.I.

.264 WINCHESTER MAGNUM

Gun

DOUGLAS

Max Length

2.500"

Barrel Length

24"

Trim Length

2.480"

Primer

CCI 250

OAL Max

3.340 "

Case

WW

OAL Min

3.160"

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length Comment

SRA100 SP

4350

60.3

3102

4350

67.0

3523

62,900

3.220"

3100

64.8

3054

3100

72.0

3471

61,900

8700

74.7

2732

8700

83.0

3105

40,800

Compressed

NOS 125 (Part)

4350

48.6

2502

4350

54.0

2843

60,800

3.265"

3100

52.2

2534

3100

58.0

2880

61,300

8700

69.3

2765

8700

77.0

3142

64,000

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length Comment

NOS 140 (Part)

4350

47.7

2414

4350

53.0

2743

64,000

3.265"

3100

50.4

2402

3100

56.0

2729

61,600

8700

64.8

2559

8700

72.0

2908

62,700

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