SVDK (Russian : СВДК) is a Russian sniper rifle from the Dragunov sniper rifle family chambered for the 9.3x64mm Brenneke cartridge. The Dragunov SVDK large caliber sniper rifle (any rifle caliber above 9 mm is considered a large caliber in Russia) is a somewhat controversial weapon, recently adopted by Russian army.
It was developed through "Vzlomshik" (Breaker) research and development program, along with 7.62 mm SV-98 sniper and 12.7 mm ASVK anti-materiel rifles. The purpose of SVDK is to deal with targets which are too hard for standard 7.62x54R sniper rifles like SV-98 or SVD, such as assault troops in heavy body armor or enemy snipers behind cover.
There also were rumors that SVDK will serve as a long-range anti-personnel weapon. The effective range of SVDK is cited as 'about 600 meters'