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The Other Cartridge Proposed by Frankfort Arsenal for use in the early AR-15

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    The Other Cartridge Proposed by Frankfort Arsenal for use in the early AR-15

    During the early development of the 7,62mm cartridge, US Project Salvo also continued with the idea of using more than one bullet in a cartridge case. By 1959, Frankfort Arsenal had designed another cartridge to replace the 222 Remington Special already being tested and was later to become the 223/5,56mm.
    Frankfort Arsenal used the old 25 Remington cartridge modified and called the 6,35x48mm (there was also a 6,35x52mm too). This Frankfort cartridge was designed to fire a single 70gr bullet at 3345 fps and a green tip Duplex (FA-T127) which fired a 54gr bullet at 2600FPS and 55gr bullet at 2460fps.
    Winchester manufactured lots of the 6,35x48 with their WCC 59 headstamp while Frankfort Arsenal manufacture had their FA 58 headstamp

    This new 6,35x48 cartridge was tested in bolt action rifle but was designed for use in the AR-15 rifle. With the adoption of the 222 Remington the 6,35x48 cartridge was discontinued

    my photos show the 25 Remington, 6,35x48 and Duplex Green Tip 6,35x48
    Attached Files
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