CCI Made Ruger 70th Anniversary .22 RF

22%20Headstamp
(Photo from: https://reibert.info/threads/patrony-kolcevogo-vosplamenenija-rimfire-ammunition.246614/page-10)

Ruger 100rd box promotional photo, note the ‘’ C ‘’ headstamped cartridges.

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Thanks for posting this! I just purchased a Ruger Mk-IV 70th Anniversary pistol; I’ll add a box of “anniversary” ammo too.