CPC F42B 5/025 (2013.01) [F42B 5/28 (2013.01); F42C 19/083 (2013.01)] | 20 Claims |
1. A semiautomatic .32 caliber cartridge, comprising:
a rimless case comprising:
a forward end comprising a case mouth,
an outer case diameter that tapers to a case mouth diameter of 0.330-0.3370 in.,
an intermediate case portion comprising a rear end outer diameter of 0.3355-0.3425 in., and
a rear end comprising a groove and flange,
a .32 caliber bullet seated in the case mouth;
a propellant in the case configured to provide a chamber pressure of at least 32,000 psi; and
a primer seated in the flange,
the cartridge having a length of from 1.100 in. to 1.169 in.
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9. A semiautomatic .32 caliber cartridge, comprising:
a rimless case comprising:
a case length of about 0.827 in.,
a flange diameter of 0.3380-0.3450 in.,
a case mouth diameter of 0.330-0.3370 in.,
an intermediate case portion comprising a length of 0.500 in.,
an internal thickness taper portion that decreases in thickness toward the forward end of the cartridge, and
a rear end comprising a groove and flange,
a .32 caliber bullet seated in a case mouth at the forward end of the case and positioned forward of the internal thickness taper portion;
a propellant in the case configured to provide a chamber pressure of at least 32,000 psi; and
a primer seated in the flange,
the cartridge having a length of from 1.100 in. to 1.169 in.
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17. A semiautomatic .32 caliber cartridge, comprising:
a rimless case comprising:
a flange diameter of 0.3380-0.3450 in.,
an outer case diameter that tapers from the flange diameter to a case mouth diameter of 0.3300-0.3370 in.,
an intermediate case portion comprising a rear end outer diameter of 0.3355-0.3425 in., and a forward end outer diameter of 0.3311-0.3381 in., and
an internal thickness taper portion that decreases in thickness toward the forward end of the cartridge, and
a rear end comprising a groove and flange,
a .32 caliber bullet seated in a case mouth at the forward end of the case and positioned forward of the internal thickness taper portion, the bullet comprising a length of up to 0.9 in.;
a propellant in the case; and a primer seated in the flange,
the cartridge comprising a length of from 1.100 in. to 1.169 in., ,
the cartridge configured such that the muzzle velocity of the bullet fired from a pistol is between 1160 fps and 1350 fps, and the muzzle energy of the bullet fired from a pistol is between 344 and 405 ft-lbf.
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