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The Ordnance quick-firing 6-pounder 7 cwt, [note 1] or just 6-pounder, was a British 57 mm gun, serving during the Second World War as a primary anti-tank gun of both the British and United States Army (as the 57 mm gun M1).
6-pounder gun or 6-pdr, usually denotes a 57-millimetre (2.2 in) gun firing a projectile weighing approximately 6 pounds (2.7 kg).. Guns of this type include: QF 6 pounder Hotchkiss, a 57 mm naval gun of the 1880s; a similar weapon was designed by Driggs-Schroeder for the US Navy
A complete round weighed 9.7 lb (4.4 kg) and its projectile weighed 6 lb (2.7 kg). The most common types of ammunition available for 6-pounder guns were shrapnel , steel and common shells. In World War II higher-yield high explosive rounds were produced.
7,300 yards (6,675 m) The Ordnance QF 6-pounder 6 cwt Hotchkiss Mk I and Mk II was a shortened version of the original QF 6 pounder Hotchkiss naval gun , and was developed specifically for use in the sponsons of the later marks of British tanks in World War I , from Mark IV onwards.
The stone or stone weight (abbreviation: st.) [1] is an English and British imperial unit of mass equal to 14 avoirdupois pounds (6.35 kg). [nb 1] The stone continues in customary use in the United Kingdom and Ireland for body weight.
The spherical case shot weighed 5.7 lb (2.6 kg) and released 41 musket balls when it burst. The canister round weighed 7.32 lb (3.3 kg) and contained 27 iron balls. [ 17 ] At 5° elevation, the gun could hurl the round shot a distance of 1,523 yd (1,392.6 m) with the standard firing charge of 1.25 lb (0.6 kg).
The six-pounder's tube was 53 in (135 cm) long, weighed 725 pounds (329 kg) and had an effective range (at 35°) of 7,000 yards (6,400 m), with a standard powder charge of 0.75 pounds (0.34 kg) and 6 lb. (2.72 kg) Hotchkiss bolt-type projectiles.
Avoirdupois is a system of mass based on a pound of 16 ounces, while Troy weight is the system of mass where 12 troy ounces equals one troy pound. The symbol g 0 is used to denote standard gravity in order to avoid confusion with the (upright) g symbol for gram.