Patent ID: 8893621
Filing Date: 2014-11-25
Classification: F42B

Abstract:
1. A projectile having an ogive section ( 14 ) forward of a bearing surface section ( 16 ) forward of a boattail section ( 18 ); an aft end of the projectile is at an aft end of the boattail section ( the projectile is rotationally symmetrical; a rotationally symmetrical cavity ( the cavity ( the bearing surface section ( the bottom ( the aperture ( the base ( the boattail section ( the bearing surface section ( the depth ( the first diameter is constant from a fore end to an aft end of the bearing surface section ( the second diameter that is less than or equal to the third diameter and greater than or equal to about a quarter of the fourth diameter; the third diameter is less than or equal to the fourth diameter; the fourth diameter is less than or equal to fifty-five percent of the first diameter; the third length is between eighty-five percent and one hundred twenty-five percent of the sum of the first length and the second length.