Cartridge
The 10.75x58r cartridge used in the Berdan was also invented by Hiram Berdan, with assistance of Russian Colonel Gorloff. It was the subject of many patents in both the USA and Great Britain. The bottleneck cartridge case used the Berdan primer, its first use in a small arms cartridge. Cartridges were issued in blue paper packets of six rounds each. In addition to the regular cartridge for rifles, a special cartridge was manufactured for use in the cavalry carbine. It consisted of the same cartridge case and bullet, but with a lighter powder charge of only 4.5 grams, and was issued in six round pink paper packets. At the time of its use, the 10.75x58r (4.2 line) cartridge was known for its power and accuracy.
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