I won't doubt you, but we have had very different experiences with this ammo. I've shot alot of that stuff through two Enfields with no issues at all. I have also discussed this, and other modern RSA ammo, with friends at PMP and SABS. One actually laughed when asked about this very question, and assured me it wasn't corrosive primed. I guess if you always assume milsurp ammo is corrosive, and clean accordingly, you'll never have a problem.