7.35×56mm

The .289 Grozyar (7.35×56mm) was a cartridge developed from the 8.35x56mm cartridge. After combat experience indicated that the 8.35mm round had excessive recoil for use in light machineguns or semi-automatic rifles, the Granzerian military requested a necked-down version of the 8.35mm round for use initially in automatic weapons. From 1920-1925 the round was developed, and was first used in the HM Arzenál G-26 light machine gun. After great initial success the 7.35x56mm round was later adopted as the standard full-power rifle cartridge, first appearing in the Kt.Kar35 rifle. It was adopted as the standardized full-power Axis Cartridge in 1994.

Subsequent developments
The base of the 7.35mm round also led to the development of an intermediate round in 1940, the 7.35×42mm M43 round.

Propellant development
The lack of a suitable propellant led to the design in 1922 of Improved Infantry Rifle Propellant (JGHK) tubular nitrocellulose smokeless powder, JGHK.15 as a replacement for cordite for the 7.35mm cartridge. In 1924 JGHK.15½ added 2% tin to JGHK.15 to reduce metal fouling from cupronickel-jacketed bullets. JGHK.4064 replaced both powders in 1935 and has been used since.