30-30

[ thur-tee-thur-tee ]
/ ˈθɜr tiˈθɜr ti /

noun

a rifle using a cartridge approximately .30 inch in diameter, originally having a powder charge of 30 grains but now of various charges.
the cartridge itself.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019