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| $ 3.75 per Cartridge |
| .220 Swift Factory Proof |
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| $ 59.95 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. |
| 220 Swift Factory Proof made by Remington, and sold to the now closed Winchester Gun Factory and used to "High" "Pressure" Proof Test Rifles. Nickel Plated Brass Cases, Red dyed Projectile, and Red/Purple Dyed Head Stamp |
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