The 7.62mm Lockless Plastic Encapsulated cartridge was developed as an internal experimental cartridge by the Hughes Tool Co during 1971. The design is similar to the 5.56mm design, but according to HWS 3:424 was not submitted to any US Military agency for testing. The Hughes Company claimed ballistics equal to the 7,62mm NATO. Left hand specimen is a dummy load, while the right hand specimen is a loaded round