Ammunition cartridge with reduced propellant charge

Details Ammunition cartridge with reduced propellant charge Ammunition cartridge with reduced propellant charge

1995-08-14

1998-06-23

Tudor, Harold J.

Ammunition and explosives

Cartridges

Practice projectile type

102439, 102513, F42B 812

Patent

active

057708150

ABSTRACT:
An ammunition cartridge having a reduced propellant charge and an initial duced cartridge volume is provided. The cartridge volume is reduced by partially filling the cartridge case with a foam filler using a male mold form. The male mold form is sized to provide the desired propellant volume and tapered to maintain the desired cartridge pressure during the propellant burn. Alternately, the foam filler may be formed externally and inserted into the cartridge case. In that embodiment, an adhesive retainer is used to secure the foam filler to the base of the case. During firing, the foam filler is turned into a gas, thereby providing the large volume of the case for expansion of the propellant gases. After firing, the case is free of residue, all of the foam filler having been expelled as a gas.

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patent: 4958567 (1990-09-01), Olson
patent: 5277118 (1994-01-01), Conil

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