They are burned through (& shredded as well). I'd suggest backing the charge off, changing the patch lube & trying again. If all else fails you need a card or fiber wad between the PRB & the charge.
This is pretty much what you're looking for, maybe not so brown that's my lube doing that not rust.
This is pretty much what you're looking for, maybe not so brown that's my lube doing that not rust.