Colorado Shooter Instruction - 223 -vs- 5.56 Ammunition There are some differences you'll notice right off the bat between .223 Remington and 5.56 NATO Ammunition: On the case rim, you'll notice “223”
Large primer .223? : r/reloading
Haftvermittler & Primer | tewipack – Klebe-Onlineshop
223 Primer Shootout - Part 1 - YouTube
Starline 223 Remington Small Primer Pocket Brass (Bag of 100) - Precision Reloading
223 Caliber Bullet Lapel Pin. Unique un-dented primer! Most caliber available | eBay