‘A SHOT OF WHISKEY’
In the old west a .45 cartridge for a six-gun cost 12 cents, so did a glass of
whiskey. If a cowhand was low on cash he would often give the bartender a
cartridge in exchange for a drink. This became known as a "shot" of whiskey.
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Picture correction: .45 Colt cartridge
Great post, but those are .45 auto cartridges, not .45 six gun cartridges.