I had a few Headstamp ID charts but stumbled across this and the visual makes it amazing.
https://afte.org/resources/headstamp-guide
I'll share the others as well.
This one is long and military related.
Small-Caliber Ammunition Identification Guide. Volume 1. ...Defense Technical Information Center (.mil)https://apps.dtic.mil › sti › pdf › ADA165896
https://afte.org/resources/headstamp-guide
I'll share the others as well.
Headstamp Codes – International Ammunition Association
www.cartridgecollectors.org
This one is long and military related.
Small-Caliber Ammunition Identification Guide. Volume 1. ...Defense Technical Information Center (.mil)https://apps.dtic.mil › sti › pdf › ADA165896