| http://www.w3.org/ns/prov#value | - It is an object of the present invention to provide a projecting device or weapon such as a rifle or pistol designed to fire an explosive ballistic cartridge blank to provide propulsive power in the form of explosive gases, which by means of a pro-expansion chamber or chambers and valving means capable of controlling the actual gas pressures finally directed to the barrel or breach area in which t
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