How to tell if modern ammo is rusting?

[Jimi Jah]

If that tarnished look bothers you give the rounds a twist in a Scotch green pad.

Otherwise, that ammo is no good. I'll take it all off your hands for you.

[duckman1]

I offer an ammo disposal service if you would like to get rid of it and start with new shinny stuff. No shipping I can pick it up..

Seriously as said above the ammo is just a little tarnished. It will go bang.

[Sure Shot 45]

Brass contains zero iron therefore it cannot rust. Tarnished brass isn't an issue and won't hurt your gun.

[bohoki]

If that tarnished look bothers you give the rounds a twist in a Scotch green pad.

Otherwise, that ammo is no good. I'll take it all off your hands for you.

i would not use a green scrubby they have grit i would use steel wool

[Jimi Jah]

The Scotch green pad is made with soft plastic fibers. Soft as a fingernail. Steel wool will take off brass, steel is very hard.

Back in the old LA studio days we would tie wrap a Scotch green pad next to the patch bay. All the tt patch cables were also made of brass and would tarnish affecting continuity. One quick twist and they were clean and ready to patch in.

[M1NM]

i would not use a green scrubby they have grit i would use steel wool

Steel wool imparts little pieces of steel on/into the surface and that does rust. Don't use steel wool. Scotch brite is the right tool (if you feel the need to waste time cleaning it). Bronze wool will also work but much more expensive.
There is also various "grit" levels of scotch brite - use the finest.

[Devilock04]

[Wordupmybrotha]

Wear gloves (e.g. latex or nitrile) if you're going to fondle ammo.