I just had to ask this question, I have never owned a caliber of weapon that could use surplus ammo with corrosive components . I just bought a .308 and maybe the possibility exists that I could come into some ammo down the road that had corrosive components. I just dont know when it says "corrosive" on the advertising what exactly is corrosive - I.E. primer? powder? Does this mean that if your weapon is not cleaned very well after shooting this type of ammo, the barrel and rifling may start pitting? I am only asking as I dont truly know, and this has been one of those nagging questions I never thought to ask.