Lake City Brass 5.56x45mm NATO New Unfired Box of 500

This is true 5.56x45mm mil-spec, new, unfired, heavy duty brass with that is recent production with a Lake City headstamp. It is the same brass

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Who makes the best bullets for reloading? - Quora

Is there a large subsonic caliber that works with battle rifles (308/7.62x51) the same way 300 Blackout works for 5.56x45/.223 guns? - Quora

Is reloading .223 ammo worth it? - Quora

Lake City « Daily Bulletin

Is there a large subsonic caliber that works with battle rifles (308/7.62x51) the same way 300 Blackout works for 5.56x45/.223 guns? - Quora

308/7.62x51mm Ammo Deals

308/7.62x51mm Ammo Deals

Is it inadvisable to use two different ammos in a single magazine? - Quora