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These powder measures typically use gravity feed from a hopper of powder above an adjustable cavity in a rotating cylinder. [3] A lever rotates the cylinder so the cavity moves between an upward position where powder can drain from the hopper into the cavity, and a lower position where the powder can drain from the cavity into an empty ...
The grain is the traditional measurement of the weight of bullets, black powder and smokeless powder in English-speaking countries. It is the unit measured by the scales used in handloading; commonly, bullets are measured in increments of one grain, gunpowder in increments of 0.1 grains. [12] There are 7,000 grains in one pound.
For example, the .50-90 Sharps has a .50-inch bore and used a nominal charge of 90.0 grains (5.83 g) of black powder. Many such cartridges were designated by a three-number system (e.g., 45–120–3 1 ⁄ 4 Sharps: 45-caliber bore, 120 grains of (black) powder, 3 1 ⁄ 4-inch long case). Other times, a similar three-number system indicated ...
Bullet diameter is typically .512 in (13.0 mm), with weights of 600 to 700 grains (39 to 45 g). The powder charge is typically 140 grains (9.1 g) of black powder . Modern substitutes such as Pyrodex are sometimes used, although using smaller charges since pyrodex is less dense than black powder. [ 4 ]
The grain was the legal foundation of traditional English weight systems, [5] and is the only unit that is equal throughout the troy, avoirdupois, and apothecaries' systems of mass. [6]: C-6 The unit was based on the weight of a single grain of barley which was equal to about + 4 ⁄ 3 the weight of a single grain of wheat.
Loads (bullet weights and gunpowder loads) varied greatly. As the weight and strength increased, gunpowder loads went from 8 drams (0.5 oz, 218.75 grains, or 14.17 grams) of powder to a full ounce (16 drams, 437.5 grains, or 28.35 grams). The advent of rifling after about 1860, allowed longer conical projectiles to be stabilised, and, aside ...
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In the United States, gunpowder grains were designated F (for fine) or C (for coarse). Grain diameter decreased with a larger number of Fs and increased with a larger number of Cs, ranging from about 2 mm (1 ⁄ 16 in) for 7F to 15 mm (9 ⁄ 16 in) for 7C. Even larger grains were produced for artillery bore diameters greater than about 17 cm (6 ...
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