What is this on my brass?

[DamascusSteel]

Has anyone encountered this on once fired brass? This is from my dad's 280AI once fired factory ammo brass, its on both Hornady and Nosler brass. It's a hard tar like substance, ive never seen it on any of my brass before. Should I scrap this brass or try and tumble it till its gone? I dont want to run it up the die since it is a hard substance.

 

[Sheltowee]

Any chance there was a heavy dose of oil in the chamber before you fired?

 

[DamascusSteel]

Any chance there was a heavy dose of oil in the chamber before you fired?

Maybe but I cant recall my dad ever cleaning a rifle

 

[Addicting]

Is his cleaning rod brass or fiberglass? It looks like there was material in the chamber.

 

[rjthehunter]

Burnt plastic?

 

[DamascusSteel]

Spoke to my dad and he said he cleaned it at the end of last hunting season with a metal rod

 

[winmag]

I’d tumble it and see if it goes away.