- lubricant grooves
- канавки для смазки (на пуле)
English-Russian arms dictionary. 2013.
English-Russian arms dictionary. 2013.
Internal ballistics — Internal ballistics, a subfield of ballistics, is the study of a projectile s behavior from the time its propellant s igniter is initiated until it exits the gun barrel. The study of internal ballistics is important to designers and users of… … Wikipedia
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Paper cartridge — refers to one of various types of small arms ammunition used before the advent of the metallic cartridge. These cartridges consisted of a paper cylinder or cone containing the bullet, gunpowder, and, in some cases, a primer or a lubricating and… … Wikipedia