My sample size of 1, anecdotal data is that tamp too hard and you increase the chance of channeling significantly, can’t say I’ve encountered an issue with tamping too lightly other than the entire puck falling out when I span the portafilter, then felt very silly.
My sample size of 1, anecdotal data is that tamp too hard and you increase the chance of channeling significantly, can’t say I’ve encountered an issue with tamping too lightly other than the entire puck falling out when I span the portafilter, then felt very silly.