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Ultimately, most baristas agree that the best grind size is the one that results in a shot that pulls in 23 to 29 seconds and (Very important!) tastes great. To grind coffee beans for espresso, fill the hopper and activate the grinder for about 15 to 20 seconds.
Pulling The Shot. Once you know what machine you have and the coffee is ground, it is time to pull shots. The actual measure should be a tablespoon of espresso ground coffee for every 1 ounce of liquid. For you tekkies, thatâs 7 grams per ounce.