Patent ID: 7011028
Filing Date: 2006-03-14
Classification: F42B

Abstract:
1. A firearm cartridge comprising: a rimmed metal case having a body portion comprising a rim and a cylindrical wall portion adjacent to the rim; the rim having a thickness in the range of 0.036 to 0.043 inch; the cylindrical wall portion having a diameter in the range of 0.222 to 0.226 inch; the case having a tapered shoulder portion contiguous with the body portion; a neck portion contiguous with the shoulder portion and a defining a mouth; the mouth closely receiving a bullet having a diameter less than .22 caliber; the case having a length greater than 0.66 inch; and wherein the case has a length of at least 0.702 inch, the body portion has a length of at least 0.56 inch including the rim thickness, the shoulder portion is a frustoconical surface, and the neck portion has an outside diameter of 0.19 inch and a length of 0.100.