.240 Apex

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.240 Holland & Holland Magnum
Type Rifle
Place of origin England
Production history
Designer Holland & Holland
Designed 1920
Manufacturer Holland & Holland
Variants .240 Flanged
Specifications
Case type Rimless, Rimmed
Bullet diameter .245 in (6.2 mm)
Neck diameter .274 in (7.0 mm)
Shoulder diameter .403 in (10.2 mm)
Base diameter .450 in (11.4 mm)
Rim diameter .467 in (11.9 mm)
Rim thickness .035 in (0.89 mm)
Case length 2.49 in (63 mm)
Overall length 3.21 in (82 mm)
Primer type Berdan
Ballistic performance
Bullet mass/type Velocity Energy
100 gr (6 g) SP 2,900 ft/s (880 m/s) 1,865 ft·lbf (2,529 J)
Source(s): "Cartridges of the World" [1]

The .240 Holland & Holland Magnum (also known as the .240 Apex, .240 Belted Nitro Express, .240 Magnum Rimless, or .240 Super Express) is a centrefire sporting rifle cartridge developed in England in the 1920s, primarily for use in hunting deer and plains game. This round has always been closely associated with the firm of Holland & Holland, rifle and gun makers of London, England, which has built more magazine and double rifles in this calibre than anyone else. A rimmed variant of this cartridge, known as the .240 Magnum Flanged, was developed for use in double rifles.[1]

Overview[edit]

The ballistic performance of the .240 H&H in factory loads is very similar to that of the .243 Winchester, with a 100-grain (6.5 g) bullet with a diameter of .245 inches (contrary to the .240 name) giving a muzzle velocity of approximately 2,900 feet per second (880 m/s). When it is loaded at the same pressure as the .243 WSSM using modern powders, the .240 H&H has the potential for slightly better performance.[2]

Most bolt-action rifles made for the .240 H&H will be amply strong enough to handle handloaded cartridges at high pressure.

.240 H&H Performance Comparison
Cartridge Bullet weight Muzzle velocity Muzzle energy
.240 H&H Magnum 100 gr (6.5 g) 2,900 ft/s (880 m/s) 1,865 ft·lbf (2,529 J)
.240 Weatherby Magnum 100 gr (6.5 g) 3,406 ft/s (1,038 m/s) 2,576 ft·lbf (3,493 J)
.243 Winchester 100 gr (6.5 g) 2,960 ft/s (900 m/s) 1,945 ft·lbf (2,637 J)
.243 Winchester Super Short Magnum 100 gr (6.5 g) 3,110 ft/s (950 m/s) 2,147 ft·lbf (2,911 J)
.244 H&H Magnum 100 gr (6.5 g) 3,500 ft/s (1,100 m/s) 2,720 ft·lbf (3,690 J)
6 mm Remington 100 gr (6.5 g) 3,100 ft/s (940 m/s) 2,133 ft·lbf (2,892 J)

See also[edit]

References[edit]

  1. ^ a b Barnes, Frank C. (2006) [1965]. Skinner, Stan, ed. Cartridges of the World (11th ed.). Iola, WI, USA: Gun Digest Books. pp. 380, 408, 410. ISBN 0-89689-297-2. 
  2. ^ "The .240 Apex" by Chuck Hawks