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C-6–C-7 The dram apothecaries is equal to 3 scruples (s ap or ℈) or 60 grains (gr), [5]: C-7 or exactly 3.887 9346 grams. [5]: C-14 "Dram" is also used as a measure of the powder charge in a shotgun shell, representing the equivalent of black powder in drams avoirdupois. [16]
A 12-gauge shotgun cartridge in a transparent plastic hull, allowing the contents to be seen. From left to right: brass, propellant, over-powder wad, shot wad, #8 birdshot, over-shot wad, and crimp. A shotgun cartridge, shotshell, or shell is a type of rimmed, cylindrical (straight-walled) ammunition used specifically in shotguns.
Once semi-smokeless and smokeless powders were introduced, the weight of powder needed decreased for a given level of performance. So, shotshell makers advertised dram equivalents instead. This indicated the equivalent power of a smokeless powder shotshell to an old shotshell using that number of drams of black powder.
Shotgun shells are still rated in terms of the same archaic dram measurements, relative to their equivalence of smokeless powder load to a black-powder load weighed in drams.) John "Pondoro" Taylor mentioned in his book African Rifles and Cartridges that the 12 drams (328 gr., 3/4 oz., or 21 g.) charge would propel the projectile at around ...
In 1932 it was nationalized by the Polish Government, who consolidated all production at Rembertów. In 1934 it began producing the Darzbór ("Good Hunting") shotshell line. In 1935 it began production of the Gryf ("Griffin") shotshell line, which used French-made components by SFM that were assembled by Pocisk in Poland.
Most shotgun cartridges are measured in terms of shotgun gauge. Shotgun gauge is determined by the weight of a round lead ball that is sized to fit into its barrel. For example, the barrel of a 12-gauge shotgun is equal to the diameter of a 1/12 of a pound lead ball (0.729 in) and a 20-gauge can fit a 1/20 pound lead ball (0.615 in).
The 20-gauge shotgun, also known as 20 bore, is a type of smoothbore shotgun. 20-gauge shotguns have a bore diameter of .615 in (15.6 mm), while the 12-gauge has a bore diameter of .729 in (18.5 mm). [ 2 ] 12-gauge and 20-gauge shotguns are the most popular gauges in the United States .
It is the approximate Russian equivalent of the NATO .50 BMG (12.7×99mm NATO) round. The differences between the two are the bullet shape, the types of powder used, and that the case of the 12.7×108mm is 9 mm longer and marginally more powerful.