EspressoGirl wrote:I borrowed a scale and have been shocked to find out that I have been using 19.5 grams.
Depending on the coffee, my full 18 gram basket is anywhere from 16.5 (rare occasions) to 18.5 (not so rare) to over 20g. Recently, I've been spoiled by some Black Cat, some SO from Barefoot, some Cartel Black Market Espresso, and a P.T's espresso blend. Those are the ones that tend to be heavier, in that the same volume weighs more than, say, some domestically roasted espresso blends.
if down-dosing gets you a better cup, do it. If it doesn't, don't be shocked. Some beans just aren't like other beans.