Barnaul 5.56x45 (.223)

*The jacket material is specially developed low-carbon steel, coated with copper which passes through double heat treatment while being made. It allows to finish properties of this material up to a level of copper.

*Applied jacket material together with pressure and powder gases temperature decrease essentially diminishes barrel wear and life on the level of projectiles' copper jacket

*All the projectiles have boat tails for improving fire grouping.

*High accuracy of neck making eliminates cases influence on fire grouping.

*Fire grouping tests during cartridge manufacturing a performed in 7 to 12 inch twist barrels.

*A case is able to withstand pressure up to 700 MPa and can be extracted from a chamber without effort.

*A specially developed non-corrosive "Berdan" primer with increased width of bottom has high sensibility and is safe. It is more reliable in comparison with "Boxer" primer.