There are 64 ounces in 1/2 gallon, so there are 64 one (1) oz. shots or 42 2/3rds 1.5 oz. jiggers.
http://wiki.answers.com/Q/How_many_shots_in_a_half...

To figure out how many ounces are in a half gallon, first you need to know that 2 quarts are a half gallon. There are 4 cups per quart, and 8 ounces per cup. So, take 8 ounces and
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There are 64 shots shots in a a half gallon Src:
http://www.chacha.com/question/howmanyshotsare...

A shot is equal to 1.5 fluid ounces. So, there are 85 1/3 shots in 1 gallon or 42 2/3 in a 1/2 gallon!
http://www.kgbanswers.com/howmanyshotsarethere...
