First of all my AR is chambered in 5.56mm so I'm not worried about shooting this stuff but I am curious of what exactly I have.
I bought half of a case of ammo being sold as .223 remington. It's once loaded ammo from a company in the midwest. I recieved it and noticed the head stamps are all LC 04 with the nato symbol (circle with a "plus" sign in it) so the brass is from 5.56mm ammo.
So can I have .223 remington even though the head stamps are from 5.56mm ammo? If I understand right the throat angles are a bit different. Does the sizing die change that angle when they are reloaded?
Just wondering what exactly I have. I'm trying to figure out what my gun likes and doesn't like.
edit: or is the brass identical and only the chambers are a bit different?