thirty-thirty
noun
thir·ty-thir·ty
ˌthər-tē-ˈthər-tē 
: a rifle that fires a .30 caliber cartridge having a 30 grain powder charge
—usually written .30–30
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“Thirty-thirty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thirty-thirty. Accessed 15 Dec. 2024.
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