Industrial ammunition
A projectileless ammunition system ( 20; 320 ) includes a metallic case ( 22; 322 ). A propellant charge ( 26; 326 ) is carried by the case and covered by an over-powder member ( 24; 324 ) in the absence of a separate projectile. The ammunition is advantageously used with an industrial ballistic tool operating so that each spent case serves as the effective projectile to be propelled by firing of the next round of ammunition.
1. Ammunition for use with a discharging apparatus that includes a chamber for receiving the ammunition, a muzzle and a barrel between the chamber and the muzzle, the ammunition comprising:
a case formed of a cast zinc or a cast zinc-based alloy that extends aft-to-fore from a base to a mouth and has interior and exterior surfaces and is configured to be expelled from the muzzle;
a propellant charge contained within the case;
a primer mounted in the case; and
a member cooperating with the case to enclose the propellant charge, said ammunition lacking a projectile having a mass in excess of a mass of the case.
2. The ammunition of claim 1 wherein:
the primer is a #209 primer; and
the case has a mass of between 70 g and 100 g and a maximum diameter of between 20 mm and 26 mm.
3. The ammunition of claim 1 wherein the member is a cap extending from a rear rim of the member to a front end of the member and having a rear portion encircling a fore portion of the case.
4. The ammunition of claim 3 wherein:
the cap is formed of a resinous polymer;
the case fore portion includes a flange having an external flange diameter;
the cap rear portion includes an inwardly directed part aft of the flange and having an internal diameter less than the external flange diameter so as to cooperate with the flange to resist forward translation of the cap relative to the flange; and
a cap length is between 100% and 300% of a case length.