US 11,788,823 B2
Handgun cartridge
Bryan P. Peterson, Isanti, MN (US); and Matthew S. Schroeder, Princeton, MN (US)
Assigned to Federal Cartridge Company, Anoka, MN (US)
Filed by Federal Cartridge Company, Anoka, MN (US)
Filed on Jul. 1, 2022, as Appl. No. 17/856,503.
Application 17/856,503 is a continuation of application No. 17/153,758, filed on Jan. 20, 2021, granted, now 11,378,364.
Claims priority of provisional application 62/963,257, filed on Jan. 20, 2020.
Prior Publication US 2022/0404129 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F42B 5/02 (2006.01); F42C 19/08 (2006.01); F42B 5/28 (2006.01)
CPC F42B 5/025 (2013.01) [F42B 5/28 (2013.01); F42C 19/083 (2013.01)] 20 Claims
OG exemplary drawing
 
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.
 
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.
 
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.