10-gauge

[ ten-geyj ]
/ ˈtɛnˌgeɪdʒ /

noun

Also called 10-gauge shotgun. a shotgun using a shell of approx. 0.775 inches (1.97 cm) in diameter.
the shell itself.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019