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Rimless case

Cartridge case geometry where the extractor groove is machined into the head and the rim diameter equals the body diameter; dominant in modern centre-fire semi-automatic pistol and rifle ammunition including 9x19mm, .45 ACP, and 5.56x45mm NATO.

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Ball propellantBelted caseBerdan primer pocketBoxer primer pocketCIPExtruded (stick) propellantGilding metalHeadspaceObturationSAAMISlamfireSquib

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