Recently I was given 100 rounds of 8mm ammunition which I've got to believe is surplus of some sort. It was "given" to a gentleman who had it given to him and it just sat around in his gun vault for a number of years. Being that it was known that I recently acquired a K98k my friend passed this ammo on to me. The rounds are all in stripper clips packaged in four stripper clips per package. The package is what I would call "grocery sack" material and tied up with twine. The rounds themselves are bright brass and copper....probably because they've not been exposed to air. The primer end is stamped with 21 RPR 56. Can some knowledgable ammo guru educate me about what I have here? I appreciate any help you can give me. Many THANKS.