RG-037 or 7.62x28mm Cartridge: Soviet Version of the .300 Blackout Concept
RG-037 (a.k.a 7.62x28mm) was an experimental Soviet cartridge developed in 1983. Its parent cartridge is the 5.45x39mm. The RG-037 has similar dimensional relation to 5.45x39mm as the .300 Blackout has to .223 Remington. If you apply the .300 Blackout case forming [Read More…]