VZ 52 7.62x45 is it rare?

[araxon]

It's rare gun. Majority rifles was converted to 7.62x39 since 1957 when Czechoslovakia accepted Soviet caliber ( vz.52/57 ).
Same ammo was used in dual feed light machine gun vz.52. ( converted to vz.52/57 model as well )
Actual ammo got better external ballistic than soviet 7.62x39.