Help identifying ammunition.

[greg vess]

Looks like an intermediate rifle cartridge. That is my professional opinion and I stand behind it! 🤣

 

[BHPSteel]

Looks like an intermediate rifle cartridge. That is my professional opinion and I stand behind it! 🤣

It's better to stand behind a case with a live primer than it is to stand in front of one.

 

[tomusaf]

Just cleaned out ammo box with mixed 300 blkout. Found 25 of these

 

[Jackie Graham]

Has brass factory primer. Seems to be way it came. Not a reload

It could have been a damaged 556 round and someone sized and trimmed it to 300BO. This is easily done even with the primer in place. Then loaded it as 300BO.

 

[tomusaf]

Found another ammo can I didn't know i had. 400 rounds of 7
73x39 headstamp 13 over 99

 

[palmettomoon]

Found another ammo can I didn't know i had. 400 rounds of 7
73x39 headstamp 13 over 99

7.73 or 7.62x39? 7.73 is a new one to me.

If it's 7.62x39mm it's South African.

 

[tomusaf]

I'm sorry senior moment yes 7.62x39. Looks like good stuff