The ammunition for the guns has not fulfilled all the expectation. The most serious shortcoming was the lack of dedicated anti-ship shells. In addition to normal tank gun ammunition and air burst shells with mechanical time-delay fuse, semi-armour piercing shells from Riga class frigates (Finnish Navy had two such ships) were available. As attempts to purchase suitable munitions from Russia did not succeed, it was also considered to purchase them from China. However, in the end a domestic development work began in the beginning of the 1990s on shells suitable for naval engagements.