Hey guys I picked up a bunch of different .308 ammo in trade yesterday. 120 rounds of what I got is some type of surplus ammo. Its brass cased fmj. It is in 20 round unmarked cardboard boxes. The headstamp has four markings on it, one each at the 12, 3, 6, and 9 oclock positions. the four markings are 10, 50, 8, and the last one is a small star with a dash next to it. My buddy who I got it from said he thought it was british but he cant remember because he got it a long time ago. I have looked all over online and in some of my books and cant find any info. Mostly, I am concerned if it is corrosive or not. Thanks in advance for the info guys.