Do you know what Cartridge this is?

[Barleyologist]

I'm curious what the two on the right are next to a .22 LR for size, any thoughts?


Head Stamp I beleive says 'LC 12'

[TKM]

It might be 300 BLK now, but it used to be regular old 2012 Lake City Nato XM193.

[clbshooter]

Yes converted to 300BO

[Barleyologist]

Thanks Guys

[Lonestargrizzly]

30-07 I believe.

[pdsmith505]

Def. .300 blk... but what's up with the primer crimp?

[gbarbo001]

Def. .300 blk... but what's up with the primer crimp?

Formerly crimped 5.56 MM NATO brass.

[MarikinaMan]

Looks just like me 300blk brass, formerly known as 5.56

[alpha_romeo_XV]

The 4 point crimp is not very common. Are you doing forensics from a crime scene?

[PatC415]

Could this be "NEW" LC Factory 300BLK Brass. Looks like the stakes were put on AFTER the primer was installed?
I know Federal made "NEW" 300BLK with a FC 300 headstamp, not sure about LC.

[pdsmith505]

I've never seen a "4 point crimp"

Further, on the assumption that it was reformed LC brass, I was wondering how the reloader crimped it at home.

That's all.

[TKM]

It looks like the new mil spec for M855A1 ammunition. They want staked primers, LC/ATK stake the primers.

[Noonanda]

It looks like the new mil spec for M855A1 ammunition. They want staked primers, LC/ATK stake the primers.

yep due to higher pressures from what I have read. I wonder if they pulled down ammo and resized without decapping/depriming