I have a strange 7.62X51 in my odds and ends box that I have never seen elsewhere. It is headstamped LC 70 with the NATO circle-cross. The bullet appears to be a black plastic sabot, which clearly has four sections (or petals). Above the case mouth, it has a cylindrical body about 9mm long and a conical nose. You can see a pinhead size metal core showing at the flat bullet tip. I’ve had it for a long time, but do not remember its source. It is clearly an original LC load, at least it shows no signs of being reloaded. So what is it?
I do remember reading that at one time there were some saboted DU-core bullets made up in 7.62X51. Could this be one of them?