7mm Weatherby Magnum

7 mm Weatherby Magnum

7 mm Weatherby cartridge
Type Game Cartridge
Place of origin United States
Production history
Designer Roy Weatherby
Designed Circa 1940 (1940)
Specifications
Case type Belted, Bottleneck
Bullet diameter .284 in (7.2 mm)
Neck diameter .312 in (7.9 mm)
Shoulder diameter .490 in (12.4 mm)
Base diameter .511 in (13.0 mm)
Rim diameter .530 in (13.5 mm)
Rim thickness .048 in (1.2 mm)
Case length 2.55 in (65 mm)
Overall length 3.25 in (83 mm)
Rifling twist 1:10
Primer type Large Rifle
Maximum pressure 65,000 psi
Ballistic performance
Bullet mass/type Velocity Energy
160 gr (10 g) AccuBond 3,050 ft/s (930 m/s) 3,306 ft·lbf (4,482 J)
139 gr (9 g) Spire Point 3,240 ft/s (990 m/s) 3,343 ft·lbf (4,532 J)
154 gr (10 g) Spire Point 3,123 ft/s (952 m/s) 3,401 ft·lbf (4,611 J)
120 gr (8 g) TTSX 3,430 ft/s (1,050 m/s) 3,136 ft·lbf (4,252 J)
175 gr (11 g) A-Frame 3,070 ft/s (940 m/s) 3,662 ft·lbf (4,965 J)
Test barrel length: 26''
Source(s): Midwayusa.com

The 7 mm Weatherby Magnum is a powerful (magnum) 7 mm rifle cartridge offered by the Weatherby firearms company in their Mark V rifles. The cartridge was one of the first cartridges offered by the Weatherby company.[1]

It was developed in the 1940s by Roy Weatherby. The 7 mm Weatherby Magnum did not get a lot of exposure until the early part of the 1950s when the Weatherby rifles became more available. It is a great cartridge for a one-rifle hunter that shoots long distances. It has taken game of all sizes around the world.

Weatherby Mark V in 7 mm Weatherby

Hunting

The 7mm Weatherby Magnum is useful for all American plains game including the great Bears and the American Bison. It is also particularly useful when African and Australian plains game are hunted. It is an ultra high velocity cartridge giving about 300-400 fps higher velocity with lighter bullets than the more popular 30-06 Springfield which is regarded as considerably fast. It is quite easy to flinch in anticipation of the significant recoil.

See also

References

  1. ↑ Speer Reloading Manual Rife & Pistol Number 13


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