This is the first thing that comes to mind: https://en.m.wikipedia.org/wiki/.30-06_Springfield
I’ve only ever heard this pronounced thirty aught-six.
and for the sophisticated redneck
Re:Silicon Valley Is Not a Fad
by mieseratte on Tuesday April 30, 2019 @09:00AM
(#19787474)
Also double-aught buckshot.
What contexts do you generally see it used in, out of curiosity?
I'm assuming it still appears in places besides revivals of "The Music Man"