.280 British

.280 British - an intermediate cartridge , created in the UK in the late 1940s. This cartridge had a pointed shell bullet of 7 mm (0.280 inch) caliber and a bottle-shaped sleeve, without a protruding flange, with a length of 43 mm.

.280 British
Various .280 British rounds
Cartridge type	intermediate cartridge
Producing country	Great Britain
Service History
Used	Great Britain
Production history
Time of creation	1945 year
Specifications
Cartridge Length, mm	65
Real bullet caliber , mm	7.2
Bullet weight, g	9
Muzzle velocity , m / s	770
Bullet Energy , J	2680
Liner parameters
Sleeve length mm	43
The diameter of the neck sleeve, mm	eight
The diameter of the sleeve sleeve, mm	11,4
The diameter of the base of the sleeve, mm	11.9
Diameter of sleeve flange , mm	12

Under this type of cartridge, the development of a TADEN machine gun and machine guns EM-1 and EM-2 was carried out.

After successful tests, the cartridge was adopted by the British Army in 1951 under the designation "7mm Mk1Z", but in the same year, under pressure from the United States, the new British government decided to switch to the "reduced" American rifle cartridge 7.62 × 51 mm NATO , more powerful and long-range, but not suitable for hand-held automatic weapons.