PISTOL Calibers, Boxes & Packages, CenterFire Shooting Ammo
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"METRIC" Calibers, Pistol Boxes, Packages & Single Cartridges
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Current & Obsolete, All Countries "Rmm" means "rimmed" and "no R" before "mm" means "rimless" Normally, the first number is diameter of projectile in mm, the second is case lengthin mm (not overall length).
