Large Powder maybe

Yaserdoma posted a pic, that looked like something I have. (#5)

Can anyone tell me what they were used in? (If they are powder.) Pictured with a 10mm fired case and a 12 Ga.
powder%20profile
powder%20top
I think they might be large powder “grains”, but I don’t know.

Thanks for any info.
Dan

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You could be right, i believe some of the powder charges for the USNavy 16" guns was broken down and sold as firestarters!.

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Thank You!
Dan