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| $ 2.95 per Cartridge |
| .223 Remington (5.56x45mm Nato) Factory Proof |
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| $49.95 per Box of 20 Cartridges |
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| From the now closed Winchester factory in Connecticut, once they are gone, there will be no more, as Winchester is no longer making Dummy or Proof Cartridges. Please see Proof Page (link below) for more information |
| 223 Remington or 5.56x45mm NATO by Remington and purchased by Winchester to test rifles in the now closed Winchester Factory. Nickel Cases and Red/Purple Dyed Projectile and Head Stamp. |
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