223/5.56 PMC Headstamp - Detroit Ammo Co.

Treasure trove of 5.56 / .223 headstamps - General Ammunition Discussion - International Ammunition Association Web Forum

223/5.56 Steel Core Brass Cased Ammo 'LC 14' NATO headstamp

Treasure trove of 5.56 / .223 headstamps - General Ammunition Discussion - International Ammunition Association Web Forum

55gr 5.56 NATO and .223 Remington Ammunition Comparison –

5.56MM FULL BOX PS 81 – – Your source for Collectible Ammunition

55gr 5.56 NATO and .223 Remington Ammunition Comparison –

PMC 223 & PMC 5.56 Ammo & Ammunition

Why is my .223 ammo headstamped 5.56?

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5.56 NATO And 223 Remington Once Fired Brass Mixed Headstamp 200 Count Raw Unwashed by Once Fired Brass