BB cap

noun

Definition of BB cap

: a .22 caliber metallic cartridge about 0.43 inch long overall that consists of a rimfire case and a small (as about 20 grain) round-nose lead bullet and in which originally the primer served as the propellant

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BB cap

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Cite this Entry

“BB cap.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/BB%20cap. Accessed 3 Dec. 2021.

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