A groove in any cylinder; specif., a groove around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling. Also, a groove around the base of a cartridge, where the extractor takes hold.
Circumferential groove(s) around a bullet or cartridge case. Used for identification, to hold lubricant, or to crimp case into.
1. A circumferential groove generally of corrugated appearance cut or impressed into a bullet or cartridge case 2. Sometimes used in reference to an extractor groove.
The circumferential swaged, machined or milled groove(s) around a bullet (for sealing; also often for identification) or cartridge case. Often used to provide visual or tactile identification of special loadings of military ammunition. They are also used to hold lead bullet lubricant.
Circumferential, indented ring or groove around a cartridge case or bullet with a variety of uses. Serving to either hold sold lubricant of a lead bullet, or to receive metal stripped from the bullet in passing through the bore, or to prevent the bullet from being pushed too far into the case, or to crimp the case to the bullet.
The circumferential groove or indentation in a cartridge case and / or bullet used to hold the projectile in place and prevent its rearward movement on loading, or whilst in the magazine during recoil.
Circumferential groove(s) around a bullet or cartridge case. Used for identification, to hold lubricant, or for securing the bullet in the case.. Cap See primer.
