Military 12 gage ammo - General Ammunition Discussion

Can someone tell me a little about these? I am not a shotgun ammo expert by any means. I would like to know what No. 4 chilled shot means, I’m assuming 4mm BBs and the “chilled” refers to the process but I’m not sure. Also a date would be great! I bout it for 25 bucks and just thought it was cool since I like military boxes. As usual, thanks!

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Military 12 gage ammo - General Ammunition Discussion

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