Picked up about 500 rounds of this at a gunshow 2 years ago. Still sitting on my shelf. Headstamp is WCC 88, with red sealant (I guess) around the primer. Bullet is greentip. Was sold to me as M855 green tip 62 gr. Had some feeding problems with it in a POS DPMS I had before I found this forum, and learned about the Chart and H buffers, etc. I haven't tried it in any of my BCMs or LMTs yet. Anyone know anything about this stuff? Plink it or save it for SHTF stash? Found that the headstamp code means Olin, and that's about it. There's no NATO markings on the headstamp.