Place your portafilter on a scale and tare the weight.
Grind between 18-20 grams of fine coffee and place it in a clean portafilter. Proper grind is crucial, so please use the parameters in this guide to ensure you dial in the grind correctly.
Distribute the coffee using the bottom of fingers to swipe coffee from side to side motions, then top to bottom motions.
Tamp your coffee to create an even surface. There is no need to tamp too hard, tamp about 20-30 pounds of pressure. Now give the tamper a gentle spin to even the grinds in the portafilter.
Purge your group head thoroughly and place the portafiler in the group head.
If your using a volumetric machine. Press the double shot option and ensure you pull 2 oz of coffee in a span of 25-30 seconds. If your machine pulled 2 oz in less than 25 seconds then you should redo with a finer grind size. If your machine pulled 2 oz in more than 30 seconds then you should redo with a courser grind size.