Which Military 5.56 is corrosive

[diginit]

I have some '89 South African M1A4 and some '77 Korean Interarms (early PMC?)amd don't want to shoot corrosive in my new OLL. Which Mil ammo, if any, is corrosive so I know what to stay away from. TIA

[Saigon1965]

I would imagine those modern ammo are not corrosive - I Don't believe there are any 5.56 corrosive ammo out there as they were in production since only the 60's -