[larryb]

I purchased 400 rnds of range brass at a show. All brass has been cleaned. I noticed some of the brass has black stains on the cases. Wondering what may have caused this and are they safe to use.

Larry

 

[Indyarms]

dirty fingerprints??? from the oils of the skin left on to tarnish??

As long as the structural integrity of the brass is fine, I would say they are FINE!!! If the stains come off with a little cleaning... no worries!!

 

[larryb]

Yes, it will clean up with some steel wool. My concern was a chemical that night of caused the stain and effect the metal brass to cause a failure.

Larry

 

[woodstock]

Yes, it will clean up with some steel wool. My concern was a chemical that night of caused the stain and effect the metal brass to cause a failure.

Larry

I don't know. I've never seen stains quite like those. Kind of strange looking to me. Maybe someone with some more experience will weigh in.

 

[Indyarms]

Brass natuarally oxidizes to that rich brown color... it is the presence of caustic substances that will cause the copper in the brass alloy to turn it green... ( primers/powder)

I think a little tumbling will shine em right up and they will be just fine!