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| .45 Mars Long ： ウィキペディア英語版 |
.45 Mars Long
The .45 Mars Long is an experimental centerfire pistol cartridge developed in the late 19th century. The similar .45 Mars Short used the same cupro-nickel-jacketed bullet in a case shortened to 0.66 inch. The bullet has two deep cannelures, and the case is crimped into both. The case mouth is chamfered on the outside to fit flush into the forward cannelure. The cartridge headspaces on this conical forward crimp. This elaborate bullet seating was necessary to withstand the violent feed mechanism of the Mars Automatic Pistol. The case has a thin rim and deep extractor groove in comparison to most rimless pistol cartridges.〔 The Mars cartridges were publicized as the most powerful handgun cartridges through the early 20th century; but less than 100 pistols were made and manufacture ceased in 1907.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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